4L80E wont shift & the $35 FIX!!! Don't Replace your Trans just yet
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- เผยแพร่เมื่อ 6 ก.ย. 2024
- We fix the issue of going directly to 2nd gear which is limp mode. We tried the typical remedies like Internal Wire Harness and Shift Solenoids but the issue remained. I had Vehicle speed showing on hp tuners and assumed the sensors were good. We decided to replace the speed sensors anyway and whatya know it was fixed. Watch and enjoy!
ISS & VSS sensors
GM#24203876
southerngearz@gmail.com
Cant wait to see your truck out and about. Would LOVE to do a swap like this to a '99 Blazer 4x4
Great channel btw. Hope you gain lots of viewers.
Thanks guy! With the right oil pan that swap could be pretty easy.
Dude that’s awesome I’m planning on doing it in my 4x4 4door 94 s10 blazer lol
@@---bl6px hell yeah guy!
Thanks man... I was thinking the valve body had to come out too. Mine is in 2nd gear, no 1st, 3rd or 4th so I'm figuring it's the solenoid.
Did you ever get this figured out mines doing the same thing considering changing the solenoids
@@jamesw9153 Mine was actually the harness inside the trans. Unplug it and check for trans fluid in the plug, if it's wet you have a bad harness and I'd leave the solenoids alone.
@@patkane761 what codes did you have that lead you to replace transmission harness
@@boostedkidproductions9719 It had multiple codes I really don't remember, it was a year ago. I did replace the shift solenoids and speed sensor along with the harness and it's still running fine.
Awesome video! Hey has the new plug stayed dry? I've been through several new ones that leaked....hoping whatever one you got won't leak.
I just put a 4l60e out of a ls1 Camaro into my 2001 Silverado with a 5.3. The truck idles fine but soon as I put it into gear the truck bogs down and dies. But last night I got it to drive fine in 1st and 2nd manually only though, but this morning I tried to drive my truck and it did the bogging thing and died again. Any ideas?
awesome information: great video .. keep on doing great work..
I bought 94 silverado, The car has been lying dormant for eight years , when I started to test drive, It shifts gears 1 and 2 very smoothly, but for gears 3 and 4, I have to press the gas pedal several times to change gears, When I looked at the transmission fluid it is full of bubbles, I will change the fluid tomorrow, Do you think the problem is with the transmission or other parts?
Could have lost some fluid and had enough for 1&2 but not the rest. It could be one of those situations where the more you drive it the better
I have a 2003 chevy 2500hd 6.0-4l80. Heres my weird problem:
Truck has high revs when shifting from first to second especially from a dead stop. It’ll go up to 3500-4000rpms before it shifts into next gear. The TC has been replaced recently as well because the fluid within the trans pan was burnt very much dark red so we assumed TC. Prior to the TC replacement, truck had no pull when in drive. Basically like, you switch from park to drive, release brake, truck pulls itself. It never did that until the TC was replaced. So thats good now. When you shift manually at a dead stop through 1,2,3 on the dash, you can hear and feel the gears being shifted into, so its like, the truck understands what gears its in. But as soon as you pull away from a stop, the truck is going but the RPM’s go up pretty high before it shifts into the next gear. Fluid and filter was replaced, truck is very much drivable but it just sounds like your peeling tires from every stop and go because the engine revs up high every time you leave from a stop (it also has a open exhaust system so you can obviously hear it wind up). We have no idea what it is or what it could be. No codes, no engine light. Long revved shifts from first to second. Any ideas? Already spent $840 on repairs so far.
Hmmmm it sounds like it could be the solenoid have you tried replacing the ones in the valve body. With how dirty the fluid was you may want to. It sounds like a high stall torque converter with out the high stall converter. Which is why im thinking solenoids
@@southerngearz Thats what I personally am suspecting, but I also suspect that there may be a trans code, but our $80 scanners wont pick them up (ive heard that can happen sometimes). Also forgot to note that the 4l80’s have that notorious wiring harness leak, I have seen puddled fluid inside the connector before (which also heard it can cause issues when it leaks) so i have ordered the following: Wiring harness, 1-2A solenoid, TCC solenoid, and fluid pressure solenoid. I also went and grabbed the input and output speed sensors. Generally the 4l80’s have a reverse gear issue, seems like when when most have failed the reverse was first to go out, the reverse in my transmission is so strong and quick to respond, so thats good news as well. Truck has been with a mechanic for two weeks now, parts will be in tomorrow and Friday, he’ll slap them on and see what happens, im also having him remove the manifold pressure switch in the pan and clean the buttons during the solenoid and wiring harness install. He has his thoughts, I have mine. Im thinking that the bottom left pin on the connector which is the 1-2A solenoid pin has been wicked up with fluid leaking especially with it being at the bottom and has delayed a signal or some sort to the actual solenoid, and thus confusing both the ECM AND TCM and thus not able to throw a code. Some of the shifting is intermittent symptoms, sometimes your like “hey we got progress” then an hour later it may rev up to get into second gear. Which to me sounds more electrical than mechanical unless it was a pump issue. But i feel like if it would be a pump, ALL gears would act up, not just first to second. If you manually go into first and drive, does same exact thing, so first gear does exist, it’s definitely not a missing gear or “slipping out of it”. Yeah torque converter was our first suspect, prior, the truck wouldnt even move at all in first gear. I mean 5000rpm and launching you forward. TC was replaced and the truck will crawl on its own and it’ll definitely move without slinging you forward for sure.
@semperparatus3188 yea i feel like that will do it only other thing may be the tiny mesh filters associates with valve body but that requires dropping the valve body to replace. Yea the leaking wire harness is always a good reason to replace the electrical components. Certain years have one but mine 06 still runs off the pcm.
@@southerngearz i have a similar problem i have a 4l60e my check engine light was throwing p2761 code which was the tcc solenoid so i replaced it and the shift solenoids but it’s still not shifting normally only at high rpm’s
@@PRE.Drew1did you ever get it figured out
forgive the swear, where da fudge do you find OEM PARTS? Mine is a 1997 GB Cruisemaster, built on the P-30 chevy stepvan frame. and also it weighs 14,600, is this actually sufficient for the weight? Motor seems plenty strong enough, replaced the solenoids base on a scan, mine currently stuck in 2nd gear limp mode, Tranyfluid extemely clean, very small amount of very fine gray matter is all, nothing wrong mechanically. very clean. Tried to put new filter that looked the same from O'wrongly, burnt by many bad parts for them, but I don't know yet if I put crap parts in. the new filter spout was .010 to big. for those of you who don't know that is a very small number, but a HUGE difference when it comes to trying to put something just a little too big into a slightly smaller hole. I would have needed to beat it in not to mention I would wreck it by doing so. Very many copy cats that are made wrong. Your info on the plug. I have stopped right here and am going out to check mine/, I see I have to drop the pan again. and save 70 dollars of brand new fluid. At least I've done it once, and your link to the new harness. I think I have to try this my problem sounds exactly the same/
So buddy how are things over there?
still no success, debating about the sensors. Having read what I have it seems any number of things could code out the 2 shift solenoids, I think my old ones are still good. Speed sensors could also cause this code. It seems to me you can hook up a scanner, but it might not lead to the correct solution, without understanding the full workings of the parts involved. I think I may have inadvertantly fried one that is still in there, I think 12 v polarity does matter when testing. I read something else thinking it didn't matter.
I did a 80e swap on 03 Tahoe indicating in 2nd gear but in park and won’t let me crank over any input
Did you do a segment swap in the ecu for the 80e swap? Also do you have both speed sensors wired in?
This from a hot min ago but that’s bc of your nutual safety switch. Has to be in park or N to start if it says it’s in 2nd that’s bc it is. Shift leakage always is tuff when you put it back on after any tranz drop it’s almost always funky
i just put a 4l65e in a 03 escalade and im having same issues. wont shift gears at all and speedo is dead. Replaced VSS no change. hoping to get scanner on it today for some more concrete info.
Changed my transmission with a good one and now it doesn't shift at all. Any suggestions?
Check fuse #4 10amp the transmission is electronically controlled and it reads info from the cluster if it doesn't work the transmission doesn't know when to shift
Man I have a 2016 silverado and my truck started acting up all of a sudden so im wondering if its electrical. It shifts and all that but accelerating or sometimes at speed its got this shutter. Then sometimes at speed it suddenly gets this deep hard vibration that goes and comes intermittently. Changed the filter and fluid. Trans feels reqlly good and tight. I wonder if its electrical or the damn torque converter
I ran low on fluid but when I filled it started giving me problems. With the engine light on its 2nd gear all the time. If I clear the code I get 1-2 and 4 it skips 3 and fourth feels like it slips. Is this along the lines of what your issue was? Code reads solenoid B stuck open.
Nah mine would stay in 2nd and never shift no matter what. If it is slipping its possible the clutch packs got damaged when it was low on fluid. Its very possible that stuck solenoid could cause this as well. If its stuck open then the pressure for the transfluid wouldnt be enough to keep the trans from slipping. The solenoids are the cheapest option to try first and hopefully the trans is fine overall
@@southerngearz I’ll look into that. I got a new filter as well
@@sagemata5756I'm having the same problem did you ever get it fixed
@@boostedkidproductions9719 I sold the transmission and replaced it. The fluid was burnt to hell anyway.
2009 Tahoe 4+4 going down road tranny started slipping slow down for stop sing went to take off no foward gears just reverse what you think it could be.
Whats the fluid level?
Full clean
I’m either going crazy but I can’t find the input speed sensor on my dang 2005 gmc 2500 with 6.0 4l80e where is it located I done did everything you did an have same issues 🥴 please help me…. 8:55 in video
Drivers side of the trans you should have a sensor close to the bell housing and shift linkage and the other is driver side toward the rear they are about a foot maybe foot and a half apart from each other
Patiently waiting for a video of you destroying a set of tires with old Earl and maybe some Rev limiter short videos. Let'er Rip Tater Chip
Haha me too. Installed a line lock to make that much easier then work got crazy but its all good now. Thanks guy!
Hey man I watched the whole video but I'm wondering if this little part might be the same issue I'm having. Won't shift out of first gear but if I manually shift through the gears they feel fine please help 🙏. 2003 silverado.
So thats what I was going through and it was the back sensor. Since it shifts fine manually that tells me internally it works fine. You dont hear any extra noise from the trans? Also double check your fluid level but im pretty sure its the speed sensor.
Mines will not shift out of first gear and want change even if I manual shift
I have a 2004 6.0 and on the Highway I get close to 3000 rpm at 60 then it just drops to 2500 but keeps accelerating but definitely not grabbing 3rd
Where should I start ?
im having the same issue did you solve it?
get a tune would be my 1st recommendation for sure
When this happened were you able to put it in park mine won't even lock into park
Yes I was able to put it in park. I would make sure the shift cable is actually pushing it far enough to put it in park
@Southern Gearz it is also doing what yours was doing it goes forward and back but it won't shift the rpms go up and it ne er changes gear changed all internals also
@@lindseywalker-mk2ib mine ended up being the front iss sensor if you havent changed the speed sensors i would starr there.
My 2001 Chevrolet Silverado 2500HD 6.0. I was driveing down the highway and then lost everything. No reverse 123D. I dont know what would cause that. Maybe torque convertor? Thanks anythi g helps
How are the fluids? Could be tc or the pump.
Mine did the exact same thing. Started with a hum the year before but felt fine other than hum then the hum went away one day and the next the hum came back and it just stopped accelerating and only revved like it was in neutral. All gears are now neutral besides park. If anyone's had this and fixed it I would appreciate incite
How you figured the speed sensor was the problem?
I went to drive it and it wouldnt ever shift
@@southerngearz my car wasn't shifting neither, the speed sensor connector 1 pin was push out. Replaced with a good one boom problem solved. I also thought my solenoids were bad. Thanks for the video.
Where did you order your parts from
great video subscribed
Was you driving and it stop shifting while driving
Nah it never shifted at all
Ok I can ride my car for about 15-20 minutes and it stop shifting then I will cut it off for about 30 minutes back to normal then back to not shifting
Whay kit did you buy os ot stoll holding up?
Still holding up
1-2nd it shift hard , would this help ?
Not sure if it will help or not but never hurts to replace the electronics. Unlikely to be clutches though which leaves just the electronics
@SouthernGearz Is it still good?
Yea still runs great
Having this same issue anyway that I can contact you?
Yea email southerngearz@gmail.com
So what part fixed it
I was missing the front speed sensor since I had swapped it in. That sensor is how it knows when to shift so if its bad it wont shift.
Cool ass buggy bro ; )
What gears did you have to begin with or did you have no gear
It seemed to start in 2nd gear and then never shifted
1st and 2nd gear but revs high no 3rd gear
For me my transmission problem was just the ignition switch.
Please elaborate?
@@dandandoodleflops wore out connections that makes contacts to your wiring harness in the switch area
How did you figure this out?
@@justatool Research, plus if you hit the steering column everything works perfectly as it's a known issue when you transmission, speedometer, and tack does stupid stuff.
Transmission problem ???
No help at all
Sorry but you may have more serious issues unfortunately
@@southerngearz yes sir I probably do thanks for sharing ☮️
I have a 95 and it won't shift up to overdrive and all I get is no communication from transmission pulled the plug out had transmission fluid in it put a little break clean up in there to clean the brake fluid out plugged it back in and now I have no bash gages
You need to replacs the internal wire harness and might as well do the solenoids as well
Thanks for the advice
Yea sir and thank you for watching if you need anymore help im here.
That didn't work.
Hmm thats all the electronics in these transmissions. If you are still getting a communication issue then it has to be from the chassis harness to computer. Have you replaced your speed sensors yet? They tell the trans when to shift i had one sensor bad and it wouldnt come out of second.