1947-87 Chevy & GMC Truck Speedo/Cable Diagnostics & Repair
ฝัง
- เผยแพร่เมื่อ 30 ธ.ค. 2019
- Master Tech Dave Welch shows us how to diagnose and repair problems with your Speedometer. In this case, our trucks speedo was making noise AND bouncing around when driving.
Product Link:
www.holley.com/brands/brother... - ยานยนต์และพาหนะ
![เจ้าผู้เดียว - ดิด คิตตี้ [OFFICIAL MV]](http://i.ytimg.com/vi/q0NLCYKBOTo/mqdefault.jpg)
Suuuuuper helpful. Straight to the point and great visual example presentation. Love it brother
Love your videos Dave , YOU and BROTHERS are a big help
Thank you and thanks for watching!
You’ve gotta be kidding me😂😂..I can’t wait to try this
Great videos, Great Parts !
Thanks for this video. It gave me the courage to do it myself.
You bet! Thanks for watching!
Nice. Thank God for guys at Brothers..... keep it up. 👍👏❤️
Thanks man!
Thanks for getting to the point without a bunch of wasted details - Great information.
Our pleasure!
Luv that tip keeps from having to buy a new when not needit.
Thanks for the tip.
Great video 👍🏼👍🏼👍🏼👍🏼💯
Thank you for watching!
Thanks I just learned something I didn't know I could do
Thought I needed a new cable
Right on!
Thanks man, VERY helpful
Our pleasure!
I've got a 1969 Oshkosh MB-5 fire truck with a broken speedometer. This video should help me get it back in working order!
Right on!
Good tip
Honest video. I like that. Subscribed!!!
Thanks for watching!
Thanks Brother, and peace ✌️ Brother.
Our pleasure!
Would have never known it was so simple . Of course me a new guy I'm sure getting at it and putting it back are the challenge. But good to know
Thank you for watching!
The Beau James is super clean underneath!!!
Thanks! CA original!
Thanks so much
You're welcome!
..very helpful!
Will try greasing the bouncing speedometer cable on my 1985 S10 blazer. Thanks for the information.
Did this work for you? I have an 85 s15 that is bouncing like crazy.
Mine bounces only when cold outside 40-50 degrees on my 68 Camaro, used white Lithium grease still problems going to try dry graphite next, hopefully that will help
Kool - I too have had this problem but it was the Plastic Gear !!
Good work troubleshooting and repairing that!
Can you make a video of the different gauges, and styles , and circuit boards , and wiring harness original stuff
great help so far !! do you guys happen to have any videos or products for properly swapping a 350 into an old 55 GMC pick up ? The truck right now has mounts that arent really that safe looking to me. forsure home made. so im pulling the engine out and doing some other things with it to replace a few things but id like to find a proper 350 mounting kit for this truck before i put it back in.
We are actually in the process of doing that exact video. Keep your eyes on the channel in the next few months.
Thanks for the video! I’ve got an 82’ chevy 20 with no speedometer movement at all.
This video has helped a lot just by showing me the system, even if it’s not the exact same issue I’m having!!
For me, and anyone else who might be wondering, when I look at buying replacement cables sometimes they’re labeled as “lower” or “upper” and sometimes they have different lengths.
To know what to buy, is it is simple as removing said cable and just measuring it for length? Or
Is there some other info that idk!
Thanks again!
Exactly, just measure the length. Also, some cables have a lower "extension" that's typically 12-20", so measure that too.
Have a th350 and lubed the cable . My speedometer is still bouncing around and when I stop with the drill it doesn't go back to 0 . What's the issue?
Well I just did all that !! However there is a clicking sound that seems to still be coming out of the back of the display panel.could it be a mechanical peice not necessarily the cable itself?
My speedo is noisy on my 86 C10 but it’s my gas gauge that does the bouncing around… any way to fix that issue?
My speedo spins when using the drill trick but when I put it back in my 54 chevy truck the speedo wont move. What do you think the problem is? The transmission input ?
Yep, we would suggest you check the gear on the trans output and make sure it spins when the trans spins. That's the next step.
Do you have to completely remove the cable or can it simply be disconnected, pulled out and cleaned then put back in and connected?
You can just pull it out, but it does have to be removed from the top.
One problem I have been having is a dinging sound like a door bell around 100KM/H in my 1985 s15, also have my speedo going crazy after 110 KM/H it basically goes to 6 O’clock. I will try this out and see if it fixes everything. I also get a low kinda rubber and rubber sound like my cv boot is rubbing, at low speeds.
I will give this a try and see if it fixes my issue
Same issue. To me it sounds like the bell on a cat collar being hit over and over. Ting ting ting.
If you found the cause please tell me what you found.
My 1977 Luv speedometer spins around n makes a clicking sound. Gonna try this. Good viv
Got the exact same problem it clicks left n right like a clock, have you fixed it yet?
@@thebullet7411 yeah the vid helped was the problem
I have a 1977 Chevy k20 pickup. I am looking for the part that connects in between the speedo cable and the bullet. There seems to be several different names for it. My transmission guy called it a reluctor and another mechanic called it speedo adapter drive gear. Can't seem to find the part
Call our shop and lets see if we can get you to text a photo of the part so we can determine what you need.
Ok bro, how do you do it to a 32' GMC sitting on an 85' GMC frame/trans? The end behind a 32' speedo the same as a 85' cluster? It's mounted along the inside or the coweling against the firewall and goes down the drivers side. But the 85' Speedo cable in on the transfer case on the passenger side. Wanna give a guess on the legnth I'll need???
Is that spedo cable the same on a chevy impala 2007 the lil stick on the mph jumps up and down while foot on break
Pretty sure 2007 uses an electric speedo. That's something you need to ask the dealer about.
So my speedometer only works when going around tight turns. Even then it only works for a few seconds after I straighten out. I've tight to tighten it up at the transmission but that hasn't changed anything. It did happen to start working when I hit 90mph though. It's still working so far but its a bit shakey at slower speeds. Any ideas as to why that happens?
Maybe it's binding on something when you aren't turning tight? Or maybe the drive gear in the tailshaft is sliding back and forth and disconnecting the cable intermittently?
I tried pulling out my cable from the top with needle nose pliers by it seems tight, am I just not pulling hard enough?
I should slide out fairly easily.
I got my speedo working, but now my odometer isnt working. Are there some items I need to check on before trying to crack open the gauge clusters to figure this out? Any other tips to try before opening up the cluster?
The odometer and the speedo are operated from the same cable. If the speedo works and the odo doesn't, then there is something wrong with the gauge now. You'll have to pull the gauge and do an inspection to ID the issue.
Isn’t it illegal to be messing with the odometer 🤔
DAMN this is a good a$$ video for 4 minutes! Even though this is promo for truck parts, way better than 15 minutes of some guy yakking about his dogs before he gets to the content.
Hi David I have a 53 Chevy pickup, my guage was bouncing all over, I disconnected it from the back of the speedo. But my guage is stuck on 80. With your experience do you think if I pull cable out and grease it and put it back together. You think it will drop down to 0 after driving it. While driving with cable disconnected I can see cable turning , I'm hoping it just needs grease. Thanks for your help if you could answer this for me
Sounds more like a bad speedo head instead of a bad cable. Definitely try to lube the cable first since it won't cost you anything but a little time, then move on from there if necessary!
@@BROTHERSTruckPartsTV ok thank you I'll check it out, thank you
Hi . If the cable is spinning and quiet . But soon as it jacked into cluster , it shows a way faster speed and makes a squeaking noise . What could the problem be ?
Sounds like the speedo head needs to be lubed. You'll have to pull it out to do it, but it will more than likely quite down after that.
Does it come off the gauge the same way on a '67 ?
More than likely your 67 will be screwed on to the gauge.
Dude! That's how the cable disconnects from the back of the cluster? I could never figure it out on my 85. Mine started squeaking badly when it warms up seems like.
Glad we could help!
It is common I lubed my speedometer cable with a nitrile glove and it stopped the noise
Hey I have a 1977 impala and the speedo isn’t working at all what could it be
My speedo cable wouldn't turn so I removed it and there was obvious damage, either thermal or mechanical, so I replaced it. The new one seems to be too long so I think I may not have routed it correctly. From the engine compartment, does it route inside or outside the frame rail initially? Thanks.
Inside
TY!
Mine was broken and I installed a brand new one but when I tried it with the drill counter clockwise the new cable wanted to twist up
Sounds like you've got a problem with the speedo head. You'll have to remove the speedo and see if it is binding.
My cable had a plastic sleeve over it where it goes to the transmission, does that have to stay?
We would suggest you put it back the way it was, unless you can determine it's not necessary.
Yes
My speedometer cable is connected behind the speedometer cluster with duct tape. I noticed the cable end that connects behind cluster is cut in order to fit over the end. That’s why it was taped. I seen online speedometer cables with two different ends. I’m not sure which one I will need? My gauge cluster does not have a Clip like yours? What should I do?
Does it have a screw on end? What year, make and model is it?
@@BROTHERSTruckPartsTV it’s a 1968 C10 and the speedometer cable that was on there was not screw on. I looked behind the cluster and it had a thin threaded fitting. But the cables I looked online had a larger threaded fitting on the end . I did not know if they were going to work
@@elcrazy8017 You can order one specifically for your truck on our website at www.brotherstrucks.com
I ended up replacing my speedo cable because the old one stuck to the headers and now my speedo gauge makes this rattling sound and the needle moves back-and-forth. I was going to replace the gauge but I would like a second opinion.
Try pulling out the cable again and greasing it. Also make sure that it's strapped so there are no long segments that are loosely hanging. It never hurts to disconnect it and spin it with a drill (in reverse) so you can see and hear where the problem is coming from.
Does this still work if it has a cruse control or is there a couple more steps?
Cruise control uses a multi cable system and would require a couple more steps to check the extra cables.
@@BROTHERSTruckPartsTV Do you know if there is a way to bypass it?
The truck I have one of the previous owners swapped the 6.2l diesel to a 350 or 305.
@@chairviking5936 bypass the Cruise? Just disconnect it. You can also replace the Cruise Control cable with a standard cable if you want.
I just put a new speedo cable in my 51 Chevy Truck grease and all drove it for about 30 miles and speedometer/odometer stopped working pulled the cable from transmission and it was twisted and bound up. What do you think that is?
Sounds like you have a problem with the speedo head itself. Maybe it's binding internally and causing the cable to stop spinning on one end.
@@BROTHERSTruckPartsTV Thanks for the reply. I will be buying a new internal wire for it hopefully this doesn’t happen again.
@@BROTHERSTruckPartsTV I will be checking with a drill counter clockwise just to narrow down if this happens again I know problem is in the transmission end for sure. I seen that people fully grease the transmission connector then screw it in. Should I?
@@markmclellan9618 More grease definitely won't hurt, especially if you think it's that end that could be causing the problem.
My speedometer is bouncing as shown in the video. Could this also cause the speedometer to misread?
Absolutely, our speedo was often 15-40mph off before this repair.
Yep and get you a Ticket 👹
Is that why my speedometer is off by ten or fifteen miles an hour
Tried the drill and speedometer worked. Reassembled evening but speedometer still didn't work. Any idea of what it could be?
The gear that drives the speedo in the trans is bad.
@@BROTHERSTruckPartsTV thanks! Just ordered one
Any advice on how to access the instrument cluster?
if you just need to get to the speedo cable you can simply reach up behind the cluster. If it's for something else then you have to remove the dash bezel and then you can take the cluster out.
@@BROTHERSTruckPartsTV Thanks!
Im sure this is the same for my 69 chevy nova. But my speedometer gauge says im going 70 when its really about 30... not sure how to calibrate?
There are a few calculators online available. Basically you need to measure your tire height and know your rear end gear ratio, the rest is just choosing the right speedo cable drive gear.
@@BROTHERSTruckPartsTV so my gear ratio is 3.73 i think, with 18 inch wheels 245 in the back and 225 in the front. I have a th400 in it with stock speedo cable, any more info?
@@cody_beats5371 We don't have the calculator for this. You still need to know how tall your tires are before you can even start. Get that measurement and either look up a speedometer calculator on the web or call Toy Shop Transmissions in Pomona CA and see if they can help you work it out.
Is it common for a brand new cable to have noise and bounce
Absolutely not unless the noise and bounce is coming from another issue.
Oh no 😮
Mine is out of calibration..is it still the same way to fix it?
Like it reads too fast or too slow?
@@BROTHERSTruckPartsTV like when odometer says 50mph but really im doing 70mph..its off..it doesnt bounce around
@@armygreenfj3924 you need to change the cable drive gear in the tailshaft of the trans. There are useful calculators on the web to figure out which one will work for you.
@@BROTHERSTruckPartsTV cool thanks!!! I was thinking it was the odometer
@@BROTHERSTruckPartsTV no wonder it felt like i was doing 100mph when I was doing 70mph on speedometer lol…so i need to change it since the tires are 33x12.5r15 with 355 gears..
I have an 87 Chevy that I had set in a barn for 2 months while I moved,. When I got it out both the speedometer and odometer aren't working....
Sounds like the cable broke or froze in place while it sat.
@@BROTHERSTruckPartsTV prob so. Ugh. The left gas tank hasn't worked in it either, I've can only use the right gas tank.
@@scottpittman825 bummer
Rats got to it 🤔
@@scottpittman825 the switch 🤔
The speedometer went from working, to showing really low, to being stuck at 30mph or so 24/7, I'm guessing that's a gauge issue not a cable issue?
Pull the cable off the trans and spin it with a drill to see what happens. Its possible the cable froze in the housing or the drive gear in the trans broke. After those possibilities are ruled out then it's probably your speedo.
As soon as I reach 35 mph my Speedo goes crazy and makes a weird grinding type of noise
Thats a bad cable
How to fix a floppy gas petal
Thanks for the suggestion, on what year truck specifically?
thank you because my bike can be sitiing and it says 55 mph😭
The mileage counter stop working.
My speedometer/odometer didn’t work on my 1971 Toyota Land Cruiser FJ40.
I cleaned all the glue (50 year old lube) out of the mechanism, still didn’t work.
Just put a new speedo cable on, now the odometer still doesn’t work, and the speedometer bounces WILDLY.
WTF?!?
Sounds like the drive gear in the trans might be missing a tooth or two. It's normally plastic and will wear out and break over time.
@@BROTHERSTruckPartsTV I just checked that out today and it looks brand new.
I was praying it wasn't the speedo ($500)
But that's the only thing left.😢
@@Daddy53751 Oh, maybe we misunderstood, we thought you said you cleaned and re-lubed the speedo already? If that's the case and it's still bouncy/sticky, then yeah your speedo is probably bad.
It's a 66 c10