I have a 2005 Jimmy and just spend a lot of money with a mechanic to fix my transfer case issues. Now we got 6 inches of snow and ice and I was stuck with my 4wd not engaging. I found your video, was actually able to see this was not engaging and although I was not able to repair it where I was, it allowed me to basically block it into place and get me going. 11 years after you posted this, THANK YOU!!
You know a genuine mechanic when they tell you the about the tools, and hazards, first. They explain how parts work before they explain the problem. As a guy that likes to fix his own vehicles, I sincerely appreciate these types of mechanics. Down to earth, save you money, mechanics.
I replaced 4 of those vacuum switches in 4 years. I finally diagnosed the root cause on friends hoist. We traced the 3 vacuum lines, one was a vent that went up near right headlight. The factory sliced the hose installing the battery tray and the slice allowed contamination to get to the switch and it ceased up. I cut the hose below the slice and put the filter end back on. No issues for the next 15 years.
On my 2002 blazer, I was able to remove the drivers headlight and look through a hole beneath the battery tray to see if the vac module was functioning with engine running and battery in. Headlight removes with no tools, just two L brackets to pull up.
awesome! few hours ago was on my way to go bowling while there is about 6 inches of fresh snow in the road, make it outta the driveway in 2wd go to pop it in 4wd think its engaged.. no no. end up gettin stuck. gotta go diagnose this tomorrow morning and this video helped a ton because i had no idea how it worked or what could go wrong Thanks!
thanks alot for this video, the dealer wanted $400+ to fix it and your 7 min video and a half inch socket fixed it, I also disconnected the computer for a few min but either way the thing under the battery needed switched so thanks again bud it was very much appreciated
My front differential is not engaging. one of the comments listed describes the transfer case oil coming back through the vacuum. Three years ago thatto my truck did this and filled my heater switches and all my vacuum lines with transmission fluid...it was caused by a transfer case seal between the transmission and transfer case had failed thus allowing transmission fluid to fill my vacuum lines. I had to have an expensive repair behind my dash to get my heater controls operational again Now three years later. My vacuum appears to be an issue on this front differential issue.. Thank you for this. It gave me a cause and an affect for my particular problem. I'll bet that little vacuum switch has been filled with oil also. ✌️😎
@@PitPwnyas bad as those spider injectors can be, they can also run for a long time. I think if they’re used every day they will last longer. In my experience anyway.
This helped me fix my 1997 4dr 4x4 blazer. It was a sticking cable going from the vacuum actuator under the battery to the front gearbox.. dripped some lube into the end of the cable and worked it a few times, then the vacuum actuator could pull the cable out again. 4x4 is working now...yahooo... thanks
I had same problem with mine, 1999 GMC Jimmy. Pressing 4hi or 4lo and indicator lights would blink but never lock. I have the 4 button unit so the 4x4 vacuum solenoid is on the firewall and easily accessible. Rather then pulling the battery I just pulled the vac line from solenoid that goes down to axle actuator. No vac present when pressing 4Hi, next I pulled the vac source line on the solenoid, still no vac. Traced it back to the Tee fitting on driver side. Pulled the Vac feed line going to manifold at Tee, no vac. Turns out I had a 1" gaping crack in the vac source line! Easy 15 minute, $2 fix. As a bonus my idle is much smoother too! Thanks for the video!
I now can start to diagnose my problems on a 2000 Chevrolet Blazer. When it does not engage into 4x4 auto, high, or low the light just blinks in cold weather. But in warm weather it will engage with in 15 seconds and the light will stay on solid. Now I can test it and see what it is. Thank You for this informative video!!!!! Roger
Thank you! my 4x4 was acting up on my plow truck in the middle of a snow storm i manually pulled the wire and sent it. got the job done saved me a lot of money.
Dude I dont even own an S-10/Blazer/Jimmy/S-15 but I watched this because my parents have one and these trucks are so common that I know at some point I might end up aquiring one and needing to repair this. Top notch. I subscribed to you a long while back and just found your channel again. Kudos. Thanks for the great explaination.
ALL Blazer drivers, I drive a 2000 blazer LT... My 4x4 would shift but not lock and the light would blink much like many of yours did. I never did find the vacuum switch on top of the transfer case and was told my model of blazer did not have one. But what I did do was take out the battery and pan like this video showed. I unplugged the hose from the actuator after disassembling the bracket from the body and checked the hose to make sure it had vacuum. My vacuum hose had been rotted so that
Its August 18 2020. Just bought a GMC jimmy 2000 FOR $1000 dollars with 185000 miles . This truck is in great condition. Only problem was da 4×4 was not engaging saw you video man this truck its in BITCHING PERFECT conditions thank you saw much... best deal of my life
I've just sort of reverse inherited a 2000 Jimmy, from my son, and have high hopes for my future relationship with the vehicle. When looking for gas sending unit replacement info, your videos were the 1st I found. Great video work! Excellent camera angles. I'm pleased to find that there is so much info about this vehicle available online. Seems to speak to what a great vehicle they are. Thanks for all your input!
just wanted to let you know that I have a 2000 chevy blazer and this Video was helpful for me finding the reason that it wouldn't get over 5 mph. it was the piece that the electronic wires plug into for the 4 wheel drive, that makes the 4 wheel drive work. thank you for your video.
Thanks for the video i have a 2003 blazer that the 4x4 quit working once i removed the battery and the plate i saw the actuator was bad replaced and ready to go.Thanks again and keep up the good work.
Thanks for the video. My blazer 4wd would only work on occasion, and it was very slow shifting between 2 and 4. I took the actuator out and it was full of transmission fluid. Turns out a shaft seal was leaking ATF from the trans to the transfer case, overfilling the transfer case. The vacuum would than suck up the ATF into the actuator. Quick fix was to change fluid on transfer case, permanent fix was to pull the transfer case, and replace the seals between the transmission and the transfer case.
Excellent video. Good camera shots and clear, knowledgable explaination. Better than most service information commercially produced out there. Walking out the door now to fix the problem on my neighbors Jimmy. Thank you!
Thank you so much for your video on the blazer and gmc 4 wheel drive trouble shooting, I have a 98 Jimmy and the vacuum hose got next to the exhaust manifold and burned in half. Sorry to ramble but god bless you are the man. If you don't already you should have your own shop.peace and have an awesome day.
cant believe you took battery out with it running.very brave..i work at an auto electrical shop and just beware that at the time of you removing cables with it running it will spike the alternator and usually kill the computor. so just be carefull!
Going to check this system in my blazer in the morning. My 4WD engages just slowly. The little valve you mentioned, is that somewhat of a challenge to change?
I want to say thank you for your help i found a cracked vacuum hose. And always cleaned up the switch before i traded it back in and i use my knowledge on motor vacuum as help tracing lines to what they do and where they go. I did find a vacuum hose behind abs control box going no where. Have to look into that. I will get a video of jimmy not to many people believe i only paid $600 for it.
Hey Mark, great how to. I've been through mine and still having issue. Replaced dashboard switch, replaced cable and actuator. For a while it was working. However then I started getting back pressure and trans fluid pushing out my vacume lines and back into the actuator which degraded the rubber and popped two of them. As near as I could tell vacume switch failed and allowed trans fluid to somehow be moved past. Replaced Switch now, but dash has yellow 2wd light on, and no motor click no 4wd?
I replaced vacuum switch (on the transfer case) as well as the actuator which was destroyed when transmission fluid leaked through the vacuum line. The new switch did not prevent the TF from leaking and it destroyed a 3rd and fourth actuator until I solved the problem by installing a check valve that allows vacuum but not fluid from the transmission. In order to revert to 2wd, I have to manually release the vacuum. I do this by having a dual ported check valve. I have a vacuum line extending out with a plug in it. I remove the plug for a second to release the vacuum after pushing the 2wd button.
I'm glad you made this video my jimmy was making this weird noise I have never heard before in 30 years of screwing around with cars cable was fucked thank man
Hi Mark. Thanks for this video. My Jimmy's transfert case is stuck in the 4WD position. Before I try this diagnose process on my vehicule, do you think it could be the same problem that the one you're talking about in the video?
Hey Mark, So i finally got around to fixing the 4x4 it was the valve, it was stuck. Now my 4x4 wont stop blowing fuses... every time i drive around for 5-10mins the lights go out on the 4x4 and the fuse is blown... everything engages fine at first and the actuator is working good! Any thoughts on whats going on ?
Had a question is there a spring that returns it to 2wd position? Mine locks in ok but wont unlock for about 50 miles and i tried back and forth tricks
Good video. One suggestion for a possible follow-on would be to show where that part goes on the transfer case for those unaware. of course they can just follow the hose back there too. Btw, fun to see the shared interests (I'm rebuilding a 91 s10, have built guitar amps in the past and making my living in software).
+Mark Jenkins Ah, I see the (i) up in the top corner on my laptop, but not on my android phone which is where I watched it originally. No matter. The video was great regardless. All of yours I've seen so far are top notch. Subscribed and enjoying. Oh, and thanks for the link in your reply. Blessings.
+Mark Jenkins Btw, I'm changing out the CV Axle in the 91 s10 (4.3L 4wd) that I picked up used. I have the 6 inner bolts out and am trying to get it unstuck... Any suggestions? I think they are supposed to just pull out but this one sure isn't. :) UPDATE: never mind. I got it. Just had to be a bit crankier than it. ;)
ty sm. i thought my acuator was on the transfer case itself, turned out it was just the other end of the cable! Gonna follow this step by step tomorow after work to see if thats the prob!
Great video..thanks for the info..I have an 03 s10 zr2.. I found that removing the passenger headlight .I was able to see the actuator and test it..without removing the battery or tray at all..I also had the transfer case seal fail also. It wasn't bad pulling out t case and replacing seals..After re doing my vaccum lines I lost track of the order that the 3 connect to the transfer case vacuum switch..The only diagram I see online is very easy to misinterprete I found that the vacuum supply and the exhaust lines were back words ..if I followed diagram..thank fully the vacuum fitting that goes on t case vacuum switch has a bigger fitting for exaust line than for the actuator line or the supply line.. when all diagrams and forums fail..Use your brain..thanks for the info
1998 Blazer Mark, the transfer case clunks when I go from 4h to 4l. It clacks about 3 times when I try to go to 2h, but does not change. Does the transfer case have to full of oil? I have vacuum at the actuator, it tries to pull but the cable is stuck in the diff. I got it to go into 2h 1 time, but when I changed back to 4wd it wouldn't change into 2wd. Possibly encoder motor weak? Works good going from 4wdh to 4wdl. Thanks for all your help so far.
great video. I pulled on the cable when the car was in drive and up on blocks. The 4wd switch was pushed in 4wd HI. The front wheels did not spin and the lights inside flash. I would like to see the 4wd work before I fix any vacuum leak or replace the cable. Also can not find the switch on the transfer case even after watching your video on it. I would think pulling the cable should get it in 4wd. Would having it in neutral make a difference ?
Great video, I used this video to check my cable but mine is not engaging. I going to check the vacuum hoses, do you have a diagram of all the vacuum hoses or can you tell me where they are? Thx
mark great video i have a 2004 chevy s10 4x4 crewcab as soon as i start the truck the accuater will suck in an the truck is in 2wd. the truck makes a noise when driving sometimes in 2wd an when i push 4wd button it stops
Hey Mark I press the auto four wheel drive button, starts to flash and don't hear no audible and or physical engagement and it goes into lighting up the two hi button. I press the four low, flashes a couple of times and audible and physical engagement is heard and felt, same with four hi. when taking off from these modes to two hi, and i start to drive off, trans shifts normaly but vehicle feels like it's in four wheel drive. Just recently started with this problem. Once weather starts to get a little warmer, i'll check out the procedures you mentioned in your video. Any help would be greatly appreciated. God Bless and thanx.
Your videos are very helpful. I have a 2000 Chevy S10 4x4, and one day the passenger front tire started making a noise that sounded like hard plastic rubbing the tire tread. I got out and looked but nothing. I had a mechanic look at it and he said it was the actuator and control gone bad and it was letting the 4 wheel drive slightly wanting to engage. Another mechanic said there was nothing wrong with it and that is must be something else. It does engage into 4 hi and 4 lo. this noise also will come and go. it did it for 100 miles trying to get home, but the next morning it didn't make any noise at all. Please, can you help me? Thanks.
Just replaced the 1 on my 02’ ZR2. My transfer case was engaging but front end not locking up. Quick fix, sux that the actuators are around $60 at Parts House but they come wit lifetime warranty.
Great video. My problem is electronic as I have no lights on my dash control unit. I have checked the fuses and they are fine. I have heard that there is a problem with some of the switches. I have fire going to the center wire on the 3 wire plug to the switch so I can assume everything is good to that point. The other (8 wire) plug has no power coming to it with the switch removed from the dash. Any suggestions before I buy a new switch? My cruise control is also not working and the fuse is also good on it. I would appreciate any help you can give me.
Thanks for the helpful info. I have an 01 Blazer, 4 button 4x4 controls. The transfer case either doesn't want to engage, or it gets stuck in 4 lo. I haven't checked the vacuum actuator yet, but isn't the actuator told to engage the axle only once the transfer case is in 4x4? Basically, if the vacuum actuator isn't working, is that going to prevent the transfer case from locking in?
Hello Mark, hopefully can help me. I have a 2000 Chevy Blazer 4 button system. All the lights on the button were off so I replaced the button switch itself, to no avail. The TCC module in the right kick panel had a lot of crust and corrosion. So I replaced it. Now the lights on the 2w HI light is lit, and my service four-wheel-drive light is off. I checked the diaphragm underneath the battery By applying manual vacuum. The diaphragm will hold the cable back so the cable moves freely. When I push either 4w Hi ol low the light will blink, the cable will draw for five seconds or so, then it will default back to 2 Wheel Dr. If I do this for more than two or three times all the lights on the dash go out and service four-wheel-drive light will come on, until I turn the ignition off and on again. This for the drive was working normally last fear. I don't know if I need to change the motor on the transfer case or the solenoid on the Dashboard.
Good evening... 2000 Blazer. 3 button 4wd. 2wd Clicking noise from right front that increases and decreases with truck speed. Noise initially started during an hour long drive in 2wd. No noise in reverse. Noise goes away in 4wd. Appears to be locking fine into 4wd. Sounds like a very light partial engagement gear clashing noise. I'm thinking that the Vac actuator is not fully releasing - maybe due to a sticky cable? Or maybe it is at the other end of the cable at the axle? Thoughts?
Great video got a question thou my 88 s10 will not go into 4Lo the shifter has a button on it but will not move freely and it doesn't want to stay in 4hi I going to look at the this part from the video but if that work what should I do next I Have already been under it and seen the linkage move but I really don't where to look next so advice would greatly be appreciated
I appreciate the advice, I’m thinking my actuator is toast but I’m getting ready to pull the battery in my 02 ZR2 and see what shape it’s in and go from there. #UPDATE, actuator was in good condition, the cable that works the actuator was corroded, after soaking with WD-40 I manually worked the actuator back and fourth until it got easier and now working properly.
mark love video.lot of info.....just a quick question for you.mine tries to well what seams to be trying to engage.this is what happens. the front tires try to lock up and drag real bad and lock up then go back to draging real bad.then when i disengage it,it makes a loud thump on the underside. like the axel or something just smacked the bottom of the car.after that it goes right back in to two high no prblems. i have tryed to do this a couple times in a row thinking maybe something was froze up and would brake free but no luck.if you have any thoughts on this i would love to hear them.thanks again
thank u very much, it acts like its kinda stuck half way in, your videos are awesome to, I wouldn't have had any ideas where to even start thanks to this I think I found my issue :)
i'm gonna tear into the actuator & cable today, i'm pretty sure the cable is seized, and going to need to be replaced. i haven't started on it yet, still too dark out, just mentally prepping... any suggestions on detaching the cable from underneath? am i'm i gonna run into problems, or snags? are there any tricks?
Also, the Gear Shift Cable shifts into gear immediately upon start - like the cable and/or the trans linkage is resting between "park & reverse" or "neutral & drive" and if your foot is not on the brake it takes off like a striped assed ape if you get my drift. (sorry I'm 63 and this is just a saying) PS the lnk in my previous message is a free and nice VIN decoder
Hello Mark, I have a 2000 jimmy and I'm having some problems. I believe my jimmy is trying to engage or disengage from and too 4x4 while I'm driving but not all the time. i found your video very helpful and have noticed that my diaphram is stuck in and it has no play at all. I took a video while I switch from 2x2 to 4x4 I can hear a noise trying to switch but there is no movement of the diaphragm and cable. I think it could be the valve?
***** Thanks for the reply.. Yes I believe you are right the 4x4 fuse is now blown so it hasn't been doing it all the time now. There is no vacuum at the actuator nor is there play in the line I believe my truck is actually stuck in 4x4 even though the light would say 2x2.. unfortunately nothing is open in my area today so I will have to do some more trouble shooting tomorrow. I figured I will buy a new valve anyways to see.
goodmorning MJark. yes i hear the clicking sounds like from the glove box or some where on pass side . lights all flash but wont ingage into 2hi. discounted batt for 30 now and trying that.
To test the operation of this actualtor, simply depress the diaphram and put your finger over the vacumn port. If it holds the actuator is good, if it releases while plugging the port then it is bad. If these is trans fluid inside it, then replace the transfercase vacumn switch also. If trans fruid is present you may have to replace your vacumn, vent and actuator supply hoses also.
Just engage it put vise grips on it and the transfer case will still turn it on and off. I've had a bunch of these trucks from 92 through 01 every year probably every color. Almost all of them the boot is torn so no vacuum. Pull it till front diff engages lock vise grips on so diff stays locked in. It's limited slip so doesn't hurt it. When you hit button transfer case turns it on and off. Can get little vise grips for couple bucks, and never have to worry about the stupid boot again.
Hello Mark. I have a '95 Jimmy and from a year ago to stop working today 4X4, since pressing the button 4HI or 4lo not heard of anything in the transfer, the lights and the module paraprean few clicks are heard but back to 2hi before replacement on the trasfer case motor and would like your suggestion if I could you tell where I find a diagram for vacuum hoses and connect them as the trasfer case vacuum switch
It was the encoder motor. Got one on Amazon for $142. Call a dealer with Vin # to identify which one you have. You have to remove the front wheel drive shaft to get the 3 encoder motor bolts
the 4wd light has been on since bought the truck and the vacume acuator was ripped.... noticed the cable won't go back far enough because the vacumw acuator has some wrinkles in the rubber piece so it seems like needs to withdraw more to release
Your video has helped me a lot but I still have the 4 wheel blinking light issue and no 4 wheel drive. Now when I squeeze the rubber diaphragm I can hear air coming out near the vacuum actuator solenoid. Is this normal or is it a leak and it needs to be replaced? Thanks, Chad
I have a 2005 s-10 Blazer and I have been having problems with my 4x. It will shift into 4lo, but 4hi very seldom. When I hit 4hi it just blinks then changes back to 2wd.
Hi I have a 98 gmc jimmy and this is actually my very first car with 4wd so I do not know anything about them. But mine is actually stuck in 4wd and I cannot take it off. The light on the dashboard is on 4hi and anytime I press 2hi it just blinks and goes back to 4hi. Ive had the car for only a couple months and back when I just got it when I would press 2hi or 4hi it would actually switch between them and I could hear a loud scraping/dropping noise which I could only guess means that something was engaging and that it was working. But right now like i said its stuck in 4hi and the vacuum plunger is sucked in just like yours does in this video when you turn your car on. But I jacked my car up all the way off the ground and my front wheels do not spin at all even with the lights saying its in 4hi and the plunger being sucked in. I also took it out on a wet muddy gravel parking lot and had my dad watch as I would gas it from a dead stop and the front wheels still do not spin at all only the back ones. So my problem is 1. It says I am in 4wd and the plunger is engaged/sucked in but its obvious my front tires are not engaged. And 2. even if I could get it unstuck out of 4wd I still would like to fix this so I can have a working 4wd that witches back and forth between 2hi 4hi and 4lo like its supposed to. What other things do I need to check? I took apart the dashboard because I thought that maybe it could be the switch or device/cover where the buttons and lights are that say 2hi 4hi 4lo that you push to engage the 4wd since sometimes the light will go out and come back on so I thought maybe the wires could be loose but I dont think so anymore. Please Help!
Great Video! It helped me a lot. Now I pulled the battery and when I start the truck in 2wd. the actuator is actually engaged. But I have no power to front wheels. When I turn it on 4wd it is still engaged and no power to front wheels. Any suggestions on where to go now.
Thanks for the response. The cable moves freely. I do not hear any noise from front end under normal conditions. I hear it engage when I hit the button, but that is only noise I have heard. I will look into transfer case valve.
thanks for the video. good stuff. im having a prob with my 01 jimmy . now that we have 3 ft of snow in maryland i need to get out of my alley witch is un plowed still.my 4wd selector switch just blinks at me seems like it doesn't want to go into gear. i was thinking it was the switch / circuit board itself. in any case thanks for the video.
I wonder if this is the basic idea across most 4x4 systems. I have a 2001 Toyota Sequoia and the 4x4 is not engaging. I do hear something clicking after pressing on the 4x4 button, so I suppose the fuse/electical is working?
Mark I have a 2001 blazer n it seems to go in and out of 4 wheel to 2 wheel fine ..my problem is it makes a loud noise in passenger front end only when moving forward...it sounds like riding on rumble strips at high speed ...when I begin to slow the noise gets louder which I am sure is caused by braking...when I start out and the weight is more on rear of vehicle the noise quits but as soon as weight is distributed evenly again the noise returns...could it be the actuator ? and add the fact the blazer sat still for over a year
u never mentioned at any time what the symptoms were that caused the 4x4 problems, On my 2001 blazer I have a blinking light when I engage the 4x4 hi or lo or all wheel dr. would this be the same issue related or should I be looking elsewhere?
hello it's Danny Reynolds hear from Bedford Indiana I am curious about my 2001 Chevy Blazer 4 door 4 wheel drive I am going to check with your video has taught me on it tomorrow mother than that what is the original size tires that go on this vehicle and also all of my dash lights are on I guess is going crazy and also the fuel gauge is jumping back and forth I guess it needs a new float any ideas what I should go about doing to get this fixed and what do you think in ballpark it would cost to fix it
Danny Reynolds I used to have a similar problem in my 2000 Jimmy but it hasn't done it for a while though when it rains heavy or when it take it to the carwash the dash gauge needles go crazy and it shows empty on the gas gauge and the low fuel light comes on but in reality I'm not actually out of gas that's only happens when it gets wet.
1998 Blazer 4wd - Sometimes when going down the highway get a loud grinding noise. I can slow or come to a stop, engage 4wd and then disengage, would be ok. Sometimes ok for a while (days/weeks), sometimes will do it again in 30 minutes...would it be the vacuum valve that you talked about near the end of the video??
thank you for your videos, I had problems with my s10 4x4, I watch your videos and I start to work on my truck,I start with the vacuum actuator switch, works well but I find leak on the vacuum line, and I decided change all the vacuum lines, included the line to pcv valve, was very bad, I think I have solved my problem,actuator works good. and I hear the click when change to 4wd, sorry for my english, I am writing from out side of USA.again, tanks for your videos, helps a lot.
The vid really helped. Changed the diafram and the switch on the transfer case thats all working properly now , But it is still not engaging into four wheel drive. Any idea's? Thanks
Great video! I just wanted to thank you, for all the info. I usually deal with Ford's with locking hubs. My 2000 blazer was trying to engage into 4 wheel drive while operating at highway speed. I replaced the vacuum switch and solved all problems. Thanks again!
Replacement S10 \ Blazer 4WD front differential actuator: amzn.to/2Ems7Db
Replacement transfer case vacuum switch can be found here: amzn.to/2EgB7x4
I replaced those parts but still have hopping in the front
I have a 2005 Jimmy and just spend a lot of money with a mechanic to fix my transfer case issues. Now we got 6 inches of snow and ice and I was stuck with my 4wd not engaging. I found your video, was actually able to see this was not engaging and although I was not able to repair it where I was, it allowed me to basically block it into place and get me going. 11 years after you posted this, THANK YOU!!
You know a genuine mechanic when they tell you the about the tools, and hazards, first. They explain how parts work before they explain the problem. As a guy that likes to fix his own vehicles, I sincerely appreciate these types of mechanics. Down to earth, save you money, mechanics.
I replaced 4 of those vacuum switches in 4 years. I finally diagnosed the root cause on friends hoist. We traced the 3 vacuum lines, one was a vent that went up near right headlight. The factory sliced the hose installing the battery tray and the slice allowed contamination to get to the switch and it ceased up. I cut the hose below the slice and put the filter end back on. No issues for the next 15 years.
On my 2002 blazer, I was able to remove the drivers headlight and look through a hole beneath the battery tray to see if the vac module was functioning with engine running and battery in. Headlight removes with no tools, just two L brackets to pull up.
awesome! few hours ago was on my way to go bowling while there is about 6 inches of fresh snow in the road, make it outta the driveway in 2wd go to pop it in 4wd think its engaged.. no no. end up gettin stuck. gotta go diagnose this tomorrow morning and this video helped a ton because i had no idea how it worked or what could go wrong Thanks!
Good presentation. I have resolved all this. My prob is the neutral switch not allowing cranking. Thanks. Dandahermit
thanks alot for this video, the dealer wanted $400+ to fix it and your 7 min video and a half inch socket fixed it, I also disconnected the computer for a few min but either way the thing under the battery needed switched so thanks again bud it was very much appreciated
My front differential is not engaging. one of the comments listed describes the transfer case oil coming back through the vacuum. Three years ago thatto my truck did this and filled my heater switches and all my vacuum lines with transmission fluid...it was caused by a transfer case seal between the transmission and transfer case had failed thus allowing transmission fluid to fill my vacuum lines. I had to have an expensive repair behind my dash to get my heater controls operational again Now three years later. My vacuum appears to be an issue on this front differential issue..
Thank you for this. It gave me a cause and an affect for my particular problem. I'll bet that little vacuum switch has been filled with oil also. ✌️😎
How in the hell did this design ever get approved for production? Is this supposed to be better than the 4x4 lever of the old days? So sad!
I miss the in and out Warren locking hubs, they never failed me.
It the same people that designed the Spider injection assembly. I’m really left scratching my head on these trucks, a lot.
@@PitPwnyas bad as those spider injectors can be, they can also run for a long time. I think if they’re used every day they will last longer. In my experience anyway.
This helped me fix my 1997 4dr 4x4 blazer. It was a sticking cable going from the vacuum actuator under the battery to the front gearbox.. dripped some lube into the end of the cable and worked it a few times, then the vacuum actuator could pull the cable out again. 4x4 is working now...yahooo... thanks
I had same problem with mine, 1999 GMC Jimmy. Pressing 4hi or 4lo and indicator lights would blink but never lock. I have the 4 button unit so the 4x4 vacuum solenoid is on the firewall and easily accessible. Rather then pulling the battery I just pulled the vac line from solenoid that goes down to axle actuator. No vac present when pressing 4Hi, next I pulled the vac source line on the solenoid, still no vac. Traced it back to the Tee fitting on driver side. Pulled the Vac feed line going to manifold at Tee, no vac. Turns out I had a 1" gaping crack in the vac source line! Easy 15 minute, $2 fix. As a bonus my idle is much smoother too! Thanks for the video!
I now can start to diagnose my problems on a 2000 Chevrolet Blazer. When it does not engage into 4x4 auto, high, or low the light just blinks in cold weather. But in warm weather it will engage with in 15 seconds and the light will stay on solid. Now I can test it and see what it is. Thank You for this informative video!!!!!
Roger
Thank you! my 4x4 was acting up on my plow truck in the middle of a snow storm i manually pulled the wire and sent it. got the job done saved me a lot of money.
Hey brother. Just wanted to say thank you. After watching your video and repeating your process on my truck it now works flawlessly
Dude I dont even own an S-10/Blazer/Jimmy/S-15 but I watched this because my parents have one and these trucks are so common that I know at some point I might end up aquiring one and needing to repair this. Top notch. I subscribed to you a long while back and just found your channel again. Kudos. Thanks for the great explaination.
ALL Blazer drivers, I drive a 2000 blazer LT... My 4x4 would shift but not lock and the light would blink much like many of yours did. I never did find the vacuum switch on top of the transfer case and was told my model of blazer did not have one. But what I did do was take out the battery and pan like this video showed. I unplugged the hose from the actuator after disassembling the bracket from the body and checked the hose to make sure it had vacuum. My vacuum hose had been rotted so that
As I was saying. Battery acid is always good for any important automotive function. They need to design the braking system under a battery next.
Its August 18 2020. Just bought a GMC jimmy 2000 FOR $1000 dollars with 185000 miles . This truck is in great condition. Only problem was da 4×4 was not engaging saw you video man this truck its in BITCHING PERFECT conditions thank you saw much... best deal of my life
I've just sort of reverse inherited a 2000 Jimmy, from my son, and have high hopes for my future relationship with the vehicle. When looking for gas sending unit replacement info, your videos were the 1st I found. Great video work! Excellent camera angles. I'm pleased to find that there is so much info about this vehicle available online. Seems to speak to what a great vehicle they are. Thanks for all your input!
Great explanation, what other issue do I need to look at to engage the 4W LOW?
just wanted to let you know that I have a 2000 chevy blazer and this Video was helpful for me finding the reason that it wouldn't get over 5 mph. it was the piece that the electronic wires plug into for the 4 wheel drive, that makes the 4 wheel drive work. thank you for your video.
Thanks for the video i have a 2003 blazer that the 4x4 quit working once i removed the battery and the plate i saw the actuator was bad replaced and ready to go.Thanks again and keep up the good work.
Thanks for the video. My blazer 4wd would only work on occasion, and it was very slow shifting between 2 and 4. I took the actuator out and it was full of transmission fluid. Turns out a shaft seal was leaking ATF from the trans to the transfer case, overfilling the transfer case. The vacuum would than suck up the ATF into the actuator. Quick fix was to change fluid on transfer case, permanent fix was to pull the transfer case, and replace the seals between the transmission and the transfer case.
Excellent video. Good camera shots and clear, knowledgable explaination. Better than most service information commercially produced out there. Walking out the door now to fix the problem on my neighbors Jimmy. Thank you!
Thank you so much for your video on the blazer and gmc 4 wheel drive trouble shooting, I have a 98 Jimmy and the vacuum hose got next to the exhaust manifold and burned in half. Sorry to ramble but god bless you are the man. If you don't already you should have your own shop.peace and have an awesome day.
One of the best diagnostic videos I've seen. And, unfortunately, I've had to watch a lot of them. Subscribed, and keep up the good work.
The video help me today. Found my vacuum leak at the TEE about a foot in front of the actuator.
cant believe you took battery out with it running.very brave..i work at an auto electrical shop and just beware that at the time of you removing cables with it running it will spike the alternator and usually kill the computor. so just be carefull!
You did a good job on this video mark! Just wanted to let you know
Going to check this system in my blazer in the morning. My 4WD engages just slowly. The little valve you mentioned, is that somewhat of a challenge to change?
I want to say thank you for your help i found a cracked vacuum hose. And always cleaned up the switch before i traded it back in and i use my knowledge on motor vacuum as help tracing lines to what they do and where they go. I did find a vacuum hose behind abs control box going no where. Have to look into that. I will get a video of jimmy not to many people believe i only paid $600 for it.
Make sure the gold coiled clip is secure in the groove of the pin at the actuator.
Very nice informative video. No smart-ass opinions or bumbling around, just helpful information. Well done. Thanks for posting.
Hey Mark, great how to. I've been through mine and still having issue. Replaced dashboard switch, replaced cable and actuator. For a while it was working. However then I started getting back pressure and trans fluid pushing out my vacume lines and back into the actuator which degraded the rubber and popped two of them. As near as I could tell vacume switch failed and allowed trans fluid to somehow be moved past. Replaced Switch now, but dash has yellow 2wd light on, and no motor click no 4wd?
I replaced vacuum switch (on the transfer case) as well as the actuator which was destroyed when transmission fluid leaked through the vacuum line. The new switch did not prevent the TF from leaking and it destroyed a 3rd and fourth actuator until I solved the problem by installing a check valve that allows vacuum but not fluid from the transmission. In order to revert to 2wd, I have to manually release the vacuum. I do this by having a dual ported check valve. I have a vacuum line extending out with a plug in it. I remove the plug for a second to release the vacuum after pushing the 2wd button.
Would that $15 valve cause your four wheel drive to parsley engage because that's what mine's doing partially engaging when I'm driving
Did you ever figure this out?
a BIG thanks for this video....gonna try this stuff first before a transfer case replacement!!!!! I had no idea were to start
I wish i would've found this video before my dad decided to take my jimmy and take it to the shop and have the transfer case replaced...
I'm glad you made this video my jimmy was making this weird noise I have never heard before in 30 years of screwing around with cars cable was fucked thank man
Thanks for the video! will check it out tommrow! Mine is stuck in 4wd! chould it be the same problem?
Hi Mark. Thanks for this video. My Jimmy's transfert case is stuck in the 4WD position. Before I try this diagnose process on my vehicule, do you think it could be the same problem that the one you're talking about in the video?
Hey Mark, So i finally got around to fixing the 4x4 it was the valve, it was stuck. Now my 4x4 wont stop blowing fuses... every time i drive around for 5-10mins the lights go out on the 4x4 and the fuse is blown... everything engages fine at first and the actuator is working good! Any thoughts on whats going on ?
Had a question is there a spring that returns it to 2wd position? Mine locks in ok but wont unlock for about 50 miles and i tried back and forth tricks
Awesome video! I want to buy a S-10 Blazer just so I can put this knowledge to use . Thank you!
Good video. One suggestion for a possible follow-on would be to show where that part goes on the transfer case for those unaware. of course they can just follow the hose back there too. Btw, fun to see the shared interests (I'm rebuilding a 91 s10, have built guitar amps in the past and making my living in software).
+Mark Jenkins Ah, I see the (i) up in the top corner on my laptop, but not on my android phone which is where I watched it originally. No matter. The video was great regardless. All of yours I've seen so far are top notch. Subscribed and enjoying. Oh, and thanks for the link in your reply. Blessings.
+Mark Jenkins Btw, I'm changing out the CV Axle in the 91 s10 (4.3L 4wd) that I picked up used. I have the 6 inner bolts out and am trying to get it unstuck... Any suggestions? I think they are supposed to just pull out but this one sure isn't. :) UPDATE: never mind. I got it. Just had to be a bit crankier than it. ;)
ty sm. i thought my acuator was on the transfer case itself, turned out it was just the other end of the cable! Gonna follow this step by step tomorow after work to see if thats the prob!
thanks very good video .you made that look simple. a good place to start.i have 97 blazer had 17000 mi on it when i got it.now 232000 best truck ever!
Thanks for the video i will try this..this is the first video by you i have watched and you speak very well in terms that anybody can understand you.
Great video..thanks for the info..I have an 03 s10 zr2.. I found that removing the passenger headlight .I was able to see the actuator and test it..without removing the battery or tray at all..I also had the transfer case seal fail also. It wasn't bad pulling out t case and replacing seals..After re doing my vaccum lines I lost track of the order that the 3 connect to the transfer case vacuum switch..The only diagram I see online is very easy to misinterprete I found that the vacuum supply and the exhaust lines were back words ..if I followed diagram..thank fully the vacuum fitting that goes on t case vacuum switch has a bigger fitting for exaust line than for the actuator line or the supply line.. when all diagrams and forums fail..Use your brain..thanks for the info
1998 Blazer Mark, the transfer case clunks when I go from 4h to 4l. It clacks about 3 times when I try to go to 2h, but does not change. Does the transfer case have to full of oil? I have vacuum at the actuator, it tries to pull but the cable is stuck in the diff. I got it to go into 2h 1 time, but when I changed back to 4wd it wouldn't change into 2wd. Possibly encoder motor weak? Works good going from 4wdh to 4wdl. Thanks for all your help so far.
great video. I pulled on the cable when the car was in drive and up on blocks. The 4wd switch was pushed in 4wd HI. The front wheels did not spin and the lights inside flash. I would like to see the 4wd work before I fix any vacuum leak or replace the cable. Also can not find the switch on the transfer case even after watching your video on it. I would think pulling the cable should get it in 4wd. Would having it in neutral make a difference ?
Great video, I used this video to check my cable but mine is not engaging. I going to check the vacuum hoses, do you have a diagram of all the vacuum hoses or can you tell me where they are? Thx
thanks for the vid. question tho. since the actuator is only point a to b, and not abc. how does the 4x4 hi/lo work
Sir I want to thank you for saving me alot of money. Anyone who helps me and saved me money is aces in my book!
Really helpful ,just fixed my 2001 zr2 thanks to you!
mark great video i have a 2004 chevy s10 4x4 crewcab as soon as i start the truck the accuater will suck in an the truck is in 2wd. the truck makes a noise when driving sometimes in 2wd an when i push 4wd button it stops
Hey Mark
I press the auto four wheel drive button, starts to flash and don't hear no audible and or physical engagement and it goes into lighting up the two hi button. I press the four low, flashes a couple of times and audible and physical engagement is heard and felt, same with four hi. when taking off from these modes to two hi, and i start to drive off, trans shifts normaly but vehicle feels like it's in four wheel drive. Just recently started with this problem. Once weather starts to get a little warmer, i'll check out the procedures you mentioned in your video. Any help would be greatly appreciated. God Bless and thanx.
Your videos are very helpful. I have a 2000 Chevy S10 4x4, and one day the passenger front tire started making a noise that sounded like hard plastic rubbing the tire tread. I got out and looked but nothing. I had a mechanic look at it and he said it was the actuator and control gone bad and it was letting the 4 wheel drive slightly wanting to engage. Another mechanic said there was nothing wrong with it and that is must be something else. It does engage into 4 hi and 4 lo. this noise also will come and go. it did it for 100 miles trying to get home, but the next morning it didn't make any noise at all. Please, can you help me? Thanks.
3 buttons
My sons is doing the same thing now what was the problem.
Just replaced the 1 on my 02’ ZR2. My transfer case was engaging but front end not locking up. Quick fix, sux that the actuators are around $60 at Parts House but they come wit lifetime warranty.
Great video. My problem is electronic as I have no lights on my dash control unit. I have checked the fuses and they are fine. I have heard that there is a problem with some of the switches. I have fire going to the center wire on the 3 wire plug to the switch so I can assume everything is good to that point. The other (8 wire) plug has no power coming to it with the switch removed from the dash. Any suggestions before I buy a new switch?
My cruise control is also not working and the fuse is also good on it. I would appreciate any help you can give me.
Thanks for the helpful info. I have an 01 Blazer, 4 button 4x4 controls. The transfer case either doesn't want to engage, or it gets stuck in 4 lo. I haven't checked the vacuum actuator yet, but isn't the actuator told to engage the axle only once the transfer case is in 4x4? Basically, if the vacuum actuator isn't working, is that going to prevent the transfer case from locking in?
Hello Mark, hopefully can help me. I have a 2000 Chevy Blazer 4 button system. All the lights on the button were off so I replaced the button switch itself, to no avail. The TCC module in the right kick panel had a lot of crust and corrosion. So I replaced it. Now the lights on the 2w HI light is lit, and my service four-wheel-drive light is off. I checked the diaphragm underneath the battery By applying manual vacuum. The diaphragm will hold the cable back so the cable moves freely. When I push either 4w Hi ol low the light will blink, the cable will draw for five seconds or so, then it will default back to 2 Wheel Dr. If I do this for more than two or three times all the lights on the dash go out and service four-wheel-drive light will come on, until I turn the ignition off and on again. This for the drive was working normally last fear. I don't know if I need to change the motor on the transfer case or the solenoid on the Dashboard.
Good evening... 2000 Blazer. 3 button 4wd. 2wd Clicking noise from right front that increases and decreases with truck speed. Noise initially started during an hour long drive in 2wd. No noise in reverse. Noise goes away in 4wd. Appears to be locking fine into 4wd. Sounds like a very light partial engagement gear clashing noise. I'm thinking that the Vac actuator is not fully releasing - maybe due to a sticky cable? Or maybe it is at the other end of the cable at the axle? Thoughts?
Going to check mine in the morning. It engages. Just slowly. Thanks for the helpful tip.
Great video got a question thou my 88 s10 will not go into 4Lo the shifter has a button on it but will not move freely and it doesn't want to stay in 4hi I going to look at the this part from the video but if that work what should I do next I Have already been under it and seen the linkage move but I really don't where to look next so advice would greatly be appreciated
I appreciate the advice, I’m thinking my actuator is toast but I’m getting ready to pull the battery in my 02 ZR2 and see what shape it’s in and go from there. #UPDATE, actuator was in good condition, the cable that works the actuator was corroded, after soaking with WD-40 I manually worked the actuator back and fourth until it got easier and now working properly.
When you do that cable kit to override switch can you still go into 4 low
Not only can you go 4wd low, but because you can manually disengage the front differential, you can go 2wd low.
Would you please kindly do a video on replacing a 1996 GMC Jimmy SLE (4 door), driver's door latch. Thank you.
Thanks for the Video, From Yukon, Canada... saved me lots of money :)
mark love video.lot of info.....just a quick question for you.mine tries to well what seams to be trying to engage.this is what happens. the front tires try to lock up and drag real bad and lock up then go back to draging real bad.then when i disengage it,it makes a loud thump on the underside. like the axel or something just smacked the bottom of the car.after that it goes right back in to two high no prblems. i have tryed to do this a couple times in a row thinking maybe something was froze up and would brake free but no luck.if you have any thoughts on this i would love to hear them.thanks again
thank u very much, it acts like its kinda stuck half way in, your videos are awesome to, I wouldn't have had any ideas where to even start thanks to this I think I found my issue :)
i knew nothing about how it worked. thank you.
Nice video i just got a S-10 today and this video will help get the turning again. Thanks man
Thanks, found the problem with my 96 Jimmy. The transfer case vacuum actuator was bad...
i'm gonna tear into the actuator & cable today, i'm pretty sure the cable is seized, and going to need to be replaced.
i haven't started on it yet, still too dark out, just mentally prepping... any suggestions on detaching the cable from underneath? am i'm i gonna run into problems, or snags? are there any tricks?
Also, the Gear Shift Cable shifts into gear immediately upon start - like the cable and/or the trans linkage is resting between "park & reverse" or "neutral & drive" and if your foot is not on the brake it takes off like a striped assed ape if you get my drift. (sorry I'm 63 and this is just a saying)
PS the lnk in my previous message is a free and nice VIN decoder
Hello Mark, I have a 2000 jimmy and I'm having some problems. I believe my jimmy is trying to engage or disengage from and too 4x4 while I'm driving but not all the time. i found your video very helpful and have noticed that my diaphram is stuck in and it has no play at all. I took a video while I switch from 2x2 to 4x4 I can hear a noise trying to switch but there is no movement of the diaphragm and cable. I think it could be the valve?
***** Thanks for the reply.. Yes I believe you are right the 4x4 fuse is now blown so it hasn't been doing it all the time now. There is no vacuum at the actuator nor is there play in the line I believe my truck is actually stuck in 4x4 even though the light would say 2x2.. unfortunately nothing is open in my area today so I will have to do some more trouble shooting tomorrow. I figured I will buy a new valve anyways to see.
Kodi Bogart mmm.
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Kodi Bogart my 2000 GMC Jimmy has trouble sometimes with the 4x4 system
Hi mark i have a blazer and 4wd engages the transfer case works the front drive shaft spins but the front wheels dont spin
goodmorning MJark. yes i hear the clicking sounds like from the glove box or some where on pass side . lights all flash but wont ingage into 2hi. discounted batt for 30 now and trying that.
To test the operation of this actualtor, simply depress the diaphram and put your finger over the vacumn port. If it holds the actuator is good, if it releases while plugging the port then it is bad.
If these is trans fluid inside it, then replace the transfercase vacumn switch also.
If trans fruid is present you may have to replace your vacumn, vent and actuator supply hoses also.
Just engage it put vise grips on it and the transfer case will still turn it on and off. I've had a bunch of these trucks from 92 through 01 every year probably every color. Almost all of them the boot is torn so no vacuum. Pull it till front diff engages lock vise grips on so diff stays locked in. It's limited slip so doesn't hurt it. When you hit button transfer case turns it on and off. Can get little vise grips for couple bucks, and never have to worry about the stupid boot again.
Hello Mark.
I have a '95 Jimmy and from a year ago to stop working today 4X4, since pressing the button 4HI or 4lo not heard of anything in the transfer, the lights and the module paraprean few clicks are heard but back to 2hi before replacement on the trasfer case motor and would like your suggestion if I could you tell where I find a diagram for vacuum hoses and connect them as the trasfer case vacuum switch
It was the encoder motor. Got one on Amazon for $142. Call a dealer with Vin # to identify which one you have. You have to remove the front wheel drive shaft to get the 3 encoder motor bolts
the 4wd light has been on since bought the truck and the vacume acuator was ripped.... noticed the cable won't go back far enough because the vacumw acuator has some wrinkles in the rubber piece so it seems like needs to withdraw more to release
Your video has helped me a lot but I still have the 4 wheel blinking light issue and no 4 wheel drive. Now when I squeeze the rubber diaphragm I can hear air coming out near the vacuum actuator solenoid. Is this normal or is it a leak and it needs to be replaced? Thanks, Chad
I have a 2005 s-10 Blazer and I have been having problems with my 4x. It will shift into 4lo, but 4hi very seldom. When I hit 4hi it just blinks then changes back to 2wd.
Great shots on video great explaining very easy to understand and follow along
Hi I have a 98 gmc jimmy and this is actually my very first car with 4wd so I do not know anything about them. But mine is actually stuck in 4wd and I cannot take it off. The light on the dashboard is on 4hi and anytime I press 2hi it just blinks and goes back to 4hi. Ive had the car for only a couple months and back when I just got it when I would press 2hi or 4hi it would actually switch between them and I could hear a loud scraping/dropping noise which I could only guess means that something was engaging and that it was working. But right now like i said its stuck in 4hi and the vacuum plunger is sucked in just like yours does in this video when you turn your car on. But I jacked my car up all the way off the ground and my front wheels do not spin at all even with the lights saying its in 4hi and the plunger being sucked in. I also took it out on a wet muddy gravel parking lot and had my dad watch as I would gas it from a dead stop and the front wheels still do not spin at all only the back ones. So my problem is 1. It says I am in 4wd and the plunger is engaged/sucked in but its obvious my front tires are not engaged. And 2. even if I could get it unstuck out of 4wd I still would like to fix this so I can have a working 4wd that witches back and forth between 2hi 4hi and 4lo like its supposed to. What other things do I need to check? I took apart the dashboard because I thought that maybe it could be the switch or device/cover where the buttons and lights are that say 2hi 4hi 4lo that you push to engage the 4wd since sometimes the light will go out and come back on so I thought maybe the wires could be loose but I dont think so anymore. Please Help!
Great Video! It helped me a lot. Now I pulled the battery and when I start the truck in 2wd. the actuator is actually engaged. But I have no power to front wheels. When I turn it on 4wd it is still engaged and no power to front wheels. Any suggestions on where to go now.
Thanks for the response. The cable moves freely. I do not hear any noise from front end under normal conditions. I hear it engage when I hit the button, but that is only noise I have heard. I will look into transfer case valve.
+Mark Jenkins I pulled the switch and it was stuck! So I replaced it, but still no power to front wheels. :( Thanks for all the help though
Thanks for your help! I don't have the ability to do that. I hate it, but I guess I get to go to a repair shop. Great videos though. Keep it up.
thanks for the video. good stuff. im having a prob with my 01 jimmy . now that we have 3 ft of snow in maryland i need to get out of my alley witch is un plowed still.my 4wd selector switch just blinks at me seems like it doesn't want to go into gear. i was thinking it was the switch / circuit board itself. in any case thanks for the video.
I wonder if this is the basic idea across most 4x4 systems. I have a 2001 Toyota Sequoia and the 4x4 is not engaging. I do hear something clicking after pressing on the 4x4 button, so I suppose the fuse/electical is working?
Mark I have a 2001 blazer n it seems to go in and out of 4 wheel to 2 wheel fine ..my problem is it makes a loud noise in passenger front end only when moving forward...it sounds like riding on rumble strips at high speed ...when I begin to slow the noise gets louder which I am sure is caused by braking...when I start out and the weight is more on rear of vehicle the noise quits but as soon as weight is distributed evenly again the noise returns...could it be the actuator ? and add the fact the blazer sat still for over a year
u never mentioned at any time what the symptoms were that caused the 4x4 problems, On my 2001 blazer I have a blinking light when I engage the 4x4 hi or lo or all wheel dr. would this be the same issue related or should I be looking elsewhere?
hello it's Danny Reynolds hear from Bedford Indiana I am curious about my 2001 Chevy Blazer 4 door 4 wheel drive I am going to check with your video has taught me on it tomorrow mother than that what is the original size tires that go on this vehicle and also all of my dash lights are on I guess is going crazy and also the fuel gauge is jumping back and forth I guess it needs a new float any ideas what I should go about doing to get this fixed and what do you think in ballpark it would cost to fix it
Danny Reynolds I used to have a similar problem in my 2000 Jimmy but it hasn't done it for a while though when it rains heavy or when it take it to the carwash the dash gauge needles go crazy and it shows empty on the gas gauge and the low fuel light comes on but in reality I'm not actually out of gas that's only happens when it gets wet.
1998 Blazer 4wd - Sometimes when going down the highway get a loud grinding noise. I can slow or come to a stop, engage 4wd and then disengage, would be ok. Sometimes ok for a while (days/weeks), sometimes will do it again in 30 minutes...would it be the vacuum valve that you talked about near the end of the video??
@@nogripes I'm going to try to replace the transfer case vacuum switch and see what that does.
thank you for your videos, I had problems with my s10 4x4, I watch your videos and I start to work on my truck,I start with the vacuum actuator switch, works well but I find leak on the vacuum line, and I decided change all the vacuum lines, included the line to pcv valve, was very bad, I think I have solved my problem,actuator works good. and I hear the click when change to 4wd, sorry for my english, I am writing from out side of USA.again, tanks for your videos, helps a lot.
Hey whats the after market kit u mentioned at the. End of the video that makes it to manually engage... I have no vacuum what so ever
The vid really helped. Changed the diafram and the switch on the transfer case thats all working properly now , But it is still not engaging into four wheel drive. Any idea's? Thanks
No i can't hear anything. It's my friends s10 and it has duel exhaust can't hear much.
Great video! I just wanted to thank you, for all the info. I usually deal with Ford's with locking hubs. My 2000 blazer was trying to engage into 4 wheel drive while operating at highway speed. I replaced the vacuum switch and solved all problems. Thanks again!
do you have a link on where to purchase the kit to replace to a manuel opperation? Thanks for your post very helpful!