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4L80E Transmission Problems Dan Howard 6-5-05  
My motorhome will not move when put into gear. It wants to slightly creep forward no matter which gear I have selected, even reverse. The motor will rev up, but there is no response from the transmission. The gear selector is moving on the side of the transmission. The motorhome is a TREK with the Auto brake feature.
Re: 4L80E Transmission Problems Todd Ferguson 9-12-08  
1995 Silverado. Would only shift into 2nd, reverse and park. Had the transmission rebuilt. Problem came back. It ran great for the 1st day then that night started doing the same thing. The next morning it seemed to run fine. Took it back and they said they are going to put a new used computer in it. Is this the problem or something else? They said they replaced all the electronics on & in the transmission. Also the tac and the speedometer were acting strange before all this happened. When this occurs the little orange light on the shifter goes out. Any help will be appreciated. I don't want to get ripped off.
Re: 4L80E Transmission Problems james d smith 7-25-08  
Thank you for taking my question,A friend of mine wanted to buy my 1994 gmc 2500 4x4 diesel 6.5 turbo.2 months go by and no money so repo the truck back not to find out later he was pulling a 3 axle stamp 3/4 inch steel trailor with inline 6 cummins out of a big rig.i have replaced just about everything and now my transmission is doing funny things.first it has 4L80e trans.After running on the interstate for 40 miles i came to a stop.then light turn green and my transmission seem too stall but the engine was running but the trans didnt want ot engage or slipped.then it engaes and runs fine til you stop again.but if you cut it off and start back up again it fine for a little while,oh yeah when it does slip it clunks.could it be selanoid or sensors.iwas reading some forums about 4l80e transmission problems and one gent had total rebuilt and still have the same problem.My reverse gear is really weak.the truck has 228,000 miles on it.i replaced trnsmission and filter.thanks
Re: 4L80E Transmission Problems RON COLE 10-3-08  
Re: 4L80E Transmission Problems fred pendleton 10-14-08  
I have a 3/4 ton gmc suberban 4x4. whel i purchased it the trans lines were disconnected. upon connecting the lines and driving it, it starts like it is in 4th gear till the temp. reaches normal, then it shifts fine but starts to whine louder and louder. it sounds like a rear diff that is about to go. P.S. should i replace it or can it be rebuilt thanks fred
Re: 4L80E Transmission Problems josh 11-6-08  
Ok heres the deal my buddy has a 2006 chevy silverdao(1500) with the 4L60 tranny in it that he destroyed. i was wondering if a 4L80 tranny would even work in it. like everything lining up to it or what would have to be change. and if it ever has been done. please respond if anyone knows any info about what im talking about thanks

Re: 4L80E Transmission Problems Mr. Lt1 7-20-08  
Check it out people with the 4l60e. I have a 1994 caprice 9c1, I had three codes that came up involving the transmission, i replaced all the solenoids, the filter, and the fluid and ran synthetic. And as some of you know it ran good when the car is first started up, then after you stop and start again it pulls like it in third gear. I replaced the transmission and it still did the same thing. In conclusion it was the pcm the whole time. I paid $100 for the pcm out of a 95 roadmaster out of the junkyard, and $50 for the reprogram at a chevrolet dealership and walla... the problem was fixed. $800 for a rebuilt trans with a shift kit, $60 for trans filter kit and b&m atf synthetic, $14 for each shift solenoid, $45 for tcc solenoid, and 12 hours worth of labor to change out the trans by myself. So I spent close to $1,ooo in part alone. So hopefully my pain will be your relief, enjoy people hit me up if you have anymore questions regarding anything GM.
Re: 4L80E Transmission Problems Donald Elliott 10-3-08  
4l80E shudders in 1st gear, all the way through, but is fine in second, third,etc.
Would a screen fix it or is it a force cylinoid adjustment?
Re: 4L80E Transmission Problems ernie gobin 6-23-08  
I have a 200 chevy one ton with a 6.5 diesel ane 4L80E. it shifted fine till i parked it four two weeks and wen started code came up for shift solinoid b and is stuck in limp mode. changed solinoid and no difference.. any ideas? thanks
Re: 4L80E Transmission Problems TERRY KOTZ 3-20-08  
I have a 4L80E Transmission that over the years has cracked the case several times and keeps sheering off the mounting bolts. Any comments on this?
Re: 4L80E Transmission Problems Dale Bush 3-19-08  
I have a 1997 Chevy 1500 series pick up four wheel drive. I'm stuck in drive won't down shift or up shift by itself. Tachometer, speedometer, and gear selector goes off and on by itself. Put truck six different computers to diagnose it. It told me that number one-shift cylanoid was stuck open. I change all cylanoid in the tranny. Put new neutral safety switch on the side of tranny. I still have service engine soon light on. Still have to shift truck by hand. Still have no tachometer, speedometer, and gear selector. Needed help before I lose the tranny or it drives me crazy. Thank you, Dale
Re: 4L80E Transmission Problems Billy 4-13-08  
What are codes 85 and 86 mean and what causes them
Re: 4L80E Transmission Problems Cristian 6-8-08  
Re: 4L80E Transmission Problems jeff 12-14-08  
I have a problem with my 4L80E in my 91 camaro rs. it used to shift fine till it started slipping out of overdrive and took out every gear one by one till 1st was the only gear left. when it got hot it started to get worse, cold its okay. but it will barely get out of my driveway now. does any one know what i can do?
Re: 4L80E Transmission Problems Larry 6-12-08  
My 1999 Chevy C-3500 with the 4L80E transmission want go into re-verse. It drives forward find but no re-verse. I've been told that I have a bad shift solenold. Could this be my problem? The trans mission has about 100K miles on it.
Re: 4L80E Transmission Problems Joe 7-14-08  
1993 chevy silverodo,1 ton, 4x4,6.5 turbo, replaced all the selonids, lost drive and overdrive, no slippage. Slams from the start through all the gears. Can anyone help me on this problem.

Thank you
Re: 4L80E Transmission Problems jim saykally 12-26-08  
My 96 silverado will over rev when shifting into 3rd gear when getting on the pedal a little too much. have to let it drop below 2k rpms to shift. ti
me to rebuild or shift solinoid.
any advice appreciated. thanks jim
Re: 4L80E Transmission Problems cornelis 4-30-09  
I have a 2004 Isuzu NPR with V8 gas engine. Back-up on steep incline with load. After that i got no reverse gear. Oil level and colour still perfect. When shift in-to reverse there is a soft winding noise in transmission. Forward gears all perfect. Please give advise.
Re: 4L80E Transmission Problems Brandon Phillips 3-22-09  
I have a 4l80E tranny in a 91 chevy 4 wheel drive, 6.2 liter, K2500. when you put in to reverse it will hesitate the go in slowly. Same thing when you put it into O.D.,D,2,1. What do you recomend. I jsut pulled the engine, and tranny together. I had to have a peice of my block welded. When I got it back together I put 15 quarts of tranny fluid in. I had drained the whole system to repalce filter, and pan gaskett. This is my problem. Should I put my spare 4L80E in or what. Thank's Brandon.
Re: 4L80E Transmission Problems JAMES PEFFLEY 5-11-09  
I have a 1996 GMC 2500 4x4 with a 350ci and the 4L80E trans. The trans is a fresh rebuild from a 2 wheel drive 2500 Pickup with my tailshaft housing on it. From the start, i have no reverse. Is this a result of 2x4 trans in a 4x4?
Re: 4L80E Transmission Problems Bill 5-19-09  
My 1995 Airstream motorhome on a 1994 Chevrolet chasis, 454 engine, 4L80-E Transmission. Shifts hard and seeks at 2nd to 3rd gear. At high speeds (70 mph) engine overheats, especially w/ AC running. Fuel milage down. Code is 85. Fluid level ok. Has 100k miles.Any help appreciated
Re: 4L80E Transmission Problems jeff smith 6-3-09  
1998 c2500 had tranny rebuit new ecm new alt. new coolernew solids when driveng 50 plus miles it looses overdriveturn truck then its back for aliitle while running out of things i think is the problem please help.jeff
Re: 4L80E Transmission Problems karina padilla 5-27-09  
I have a 76 camaro i just had the transmission redone but its shooting out tranny fluid from the dipstick I added an external cooler and it still is coming out the dipstick someone told me to check the vent hole the only vent hole i see is the one that has a hose attached to it so I blew the hose and its not clogged is there something that I didnt do and/or could it be the transmission pump. please could you point me in the right direction please now that the weather is nice i'd sure like to drive it thank you
Re: 4L80E Transmission Problems Edward lang 3-22-09  
I have a 1997 sierra 3/4 ton 6.5l with a 4l80e transmission. It slipes in overdrive, the fluid looks good. just serviced in nov 08. All other gears seem to be good. Also over drive has lots of pull from 0-80 but at 80 I have to baby it to keep going, & some times overdrive is gone all togeather when doing highway speed. the tran was rebuilt in 2007.
Re: 4L80E Transmission Problems Dale Schaffer 3-8-09  
Re: 4L80E Transmission Problems tim 1-19-09  
4l80e shifts 1st 2nd 3rd fine&overdrive when cold won,t shift overdrive after shifting 2 to 3 times in and out 3rd and overdrive then stays in 3rd
Re: 4L80E Transmission Problems mike 1-13-09  
I have a 2000 yukon xl 2500 that shifts hard on upshifts occasionally. No specific conditions seem to cause the problem. The truck has apprx. 120K miles.
Thanks for any help.

Re: 4L80E Transmission Problems John Chavez 1-23-09  
I have a 1997 Chevrolet Z71 that blows the fuse to the 4wd solenoid when I engage it. Please help me.
Re: 4L80E Transmission Problems jeff dillon 1-28-09  
1994 chevy 2500 turbo desial blowes fuses when you shift to 4wd i can unplug aswitch on top of the transfer case and it quits blowing the fuse is the switch bad or are they more to it
Re: 4L80E Transmission Problems carol 3-7-09  
I have a 94 chevy 1500 5.7 litre and it also has 4l80e trans. i have had trans rebuilt and worked fine. it has been about 1 and a half years now it is starting out in third gear and thats where it stays. changed computer out and worked fine for a week. then they said it was solenoids when they checked it out they said it wasnt but that there was a short because when they changed fuse it ran fine for 5 minutes then fuse popped. had short fixed but still staying in third gear please help
Test, just a test XRumerTest 3-20-17  
Hello. And Bye.
Re: 4L80E Transmission Problems rick 3-2-08  
96 3/4T 5.7L orginal owner.Trans seems to shift out of overdrive during rainy or high moisture.I changed all drive line fluids at 50k.Fluids that I use is amsoil 2000.I will be on a third change in 8K miles.
Re: 4L80E Transmission Problems Donnie Walker 11-28-06  
I have a 98 Surburan with a 4L80E.The transmission works find until you put it under a hard load. Then the trans starts to shift very hard. You can pull over and cut it off then restart the engine and the transmission then starts to shift properly. Any help would be apprectiated. Thanks
Re: 4L80E Transmission Problems JEREMY 8-20-06  
I have a 4l80e in my 1993 chevy 3/4 ton i just got a transmission form the junk yard and the big plug is not the right one it has a screw in the middle of it the one i took out does not have the screw in it did they change it on some what can i do to make it work

thank you jeremy
Re: 4L80E Transmission Problems Jerry 1-14-07  
I have a 1994 Caprice 9c1 ex police car. The trans has always worked great and has always had a hard 1-2 shift. My problem is just today when taking off from a light it seems to be stuck in 3rd or 2nd gear. I can restart the car and it will work until the next stop. No check engine light on. Thanks for your reply!
Re: 4L80E Transmission Problems Daryll 2-23-07  
I have a 93' chevy 1-Ton, the trans. would not go into overdrive, so I replaced the trans. and now I still the same problem. Do you have any suggestions.
Re: 4L80E Transmission Problems trennah 3-22-07  
Can I replace a 700r4 that came out of a 1991 chevy 3/4 ton van with a 4L80E?
Re: 4L80E Transmission Problems Robert 3-14-07  
On my last trip the trans keep shifting in and out of overdrive. Then would only shift 1,2,3, very late and hard. No noise, but now only have 2nd and reverse. Have not dropped pan yet. Before trip had a normal service done fluid and filter and no metal or abnormal findings. Suggestions ???
Re: 4L80E Transmission Problems LORN 8-1-06  
Re: 4L80E Transmission Problems scott arnold 6-19-06  
I have a 1992 chevy 1 ton 2wd 7.4 ltr 4L80E trans. It has some intermittent noises coming from underside. Trans shifts just fine fluid changed every 5000, no servere duty. It does sound like you are running over tin cans on pavement or a hissing noise, even in park at idle. just every so often it happens.

Thanx a Bunch!

Re: 4L80E Transmission Problems warren 9-6-05  
94 fleetwood pacearrow 4l80e trans no park insurance company says may have come from gm without park assembly.called gm they said never heard of this
Re: 4L80E Transmission Problems Chuck OConnor 7-11-05  
Did you Get towed in and have one rebuilt (actual have it diagonossed incase it is a linkage issue)
Re: 4L80E Transmission Problems mike 10-11-05  
I have a 2000 chevy k3500 crew cab dually with a 7.4 gas engine and a 4L80E trans. It has 163000 miles and I just had the fluid drained, the converter and trans flushed and new fluid and filter done. Now it seems like the converter isn't locking up and it is turning about 6-800 rpm higher at highway speeds with or without a load. I don't notice any slippage or shifting problems. T shop that did the work hooked up there snap-on monitor and showed me that every thing looks ok. Any idea what else to look at? Thanks
Re: 4L80E Transmission Problems Richard 5-18-06  
I have a 1994 GMC 1500 sierra 2wd and the shift solenoids are gone due to a lightnen strick which as far as I know now that it only fried the components in the transmission and I am having hell finding the parts to replace, can you tell me where I can look online where to find these parts..
Re: 4L80E Transmission Problems Michael 5-24-06  
I have a 4l80e transmission in a 3\4 ton chevy 4 wheel drive heavy duty pickup. The transmission is pushing fluid out of the vent tube when the transmission reaches approximately 200 degrees. Other than that the transmission shifts fine and operates normally.
Re: 4L80E Transmission Problems John Carr Sr 3-27-07  
I have a 4L80E that came out of my 2000 silverado at 40641 miles, I had trouble at 14000 with it slamming shifts. I had chvrolet put a new certa in and now at 83000 it shudders between shifts on long trips and temp started running 20-25 degrees higher than it normaly runs. This is a intermittent problem that occurs on long trips. Local day to day is normal. Fluid smells slightly burnt. It was serviced by GM at 54000 miles. ??????
Re: 4L80E Transmission Problems Doug 4-4-07  
2000 chevy P/U with 163000 mlies. It has no overdrive, and sometimes the 2-3 shift is delayed. Also seems to shift hard all the time. Is a replacement needed ?
Re: 4L80E Transmission Problems Wayne Baggett 11-5-07  
I have a 1992 chevy with 6.5 L with a 4l80e Transmission. It will not shift out of first gear, it does not slip under preasure.Would you happen to know
what me be the problem.

Re: 4L80E Transmission Problems peter kimball 10-6-07  
1992 gmc 4l80e trans chatters going into overdrive oterwise perfect hardly ever cjhatters when ac on help
Re: 4L80E Transmission Problems olin 11-18-07  
I have a 89 camaro and got a vortec 6.0 and a 4l80e transmission out of a 2005 chevey high output and dropt in my car and every thing runs fine but the transmission seamsto be stuck in 2nd gear iff eny one nows what the problem might be would apreaciat the info thank you
Re: 4L80E Transmission Problems Jeff 12-8-07  
I have a 97 Chevy 2500 Hd 4X4 We have the transmission apart and the reverse servo is broken.
We are going to try to rebuild this transmission and need help finding the specialty parts such as this that do not come in the rebuild kits.
Thank you,
Re: 4L80E Transmission Problems richard 2-10-08  
Slow to go in reverse,complete re-build and still problem.also burns out third gear clutch's.rev engine and will slam into gear once it get's hot,mechanic said he replaced torque converter but said that would not be causing problem.
Re: 4L80E Transmission Problems Allen Porter 2-4-08  
When transmission reaches 110 to 125 degrees it shifts very hard.You can stop for a few minutes and it will shift fine for a few miles then it starts to shift hard again. This is a 2000 GMC 4x4 with 59,000 miles. 2500 seris.
Re: 4L80E Transmission Problems peter socia 9-9-07  
I have a 1994 GMC 2500 4x4 HD with a 4l80e trans
It has a super hard 1st to 2nd shift and shifts fine otherwise is there a quick fix?
Re: 4L80E Transmission Problems perry 8-2-07  
I have a newly built transmission thatworks fine till it gets hot then the translite comes on and you have to shift it manually,I have a eng code for temp sensor on engine Iguess? please help this is for a bus that belongs to an orphanage in mexico that we support.I need to resolve this problem soon!
Re: 4L80E Transmission Problems David Baker 4-22-07  
On my 4l80e trans. I have only 1st and second gear. Am I looking at a solenoid or is it external electrical problem. I tried simple first with just a screen kit but with no luck. Just looking for a better educated guess than my own.
Re: 4L80E Transmission Problems Buck 4-15-07  
Will a 5.7 Vortec with a 4L80E tranny fit a 96 Chevy Z71,5.7 vortec with 700R 4wd?
Re: 4L80E Transmission Problems Sherman 5-18-07  
I have 1996 3/4 HD 4x4 pickup. If the tranny is in overdrive it will slip out and then nothing.... If you select 3rd it will operate normally without o/d. One Shop says New tranny but I am wondering if it is solenoids? Any thoughts?? Thanks Sherman
Re: 4L80E Transmission Problems Danny 6-2-07  
I have a 98 GMC 2500 Van 4.3 v6.The trany only works in revers when I shift 1-2-3-D nathing same as -N-

Any suggestens

Re: 4L80E Transmission Problems paul 6-28-07  
My 2004 3/4 ton Silverado has a brand new 4l80e transmission installed by the dealer and when it sits for more tan an hour it will not move until it runs for a while 1-3minutes. it acts like it is low on fluid but the dipstick is showing about a 1/2 quart high
Re: 4L80E Transmission Problems shane 7-29-09  
I have a 95 chevy silverado 2500 with 4l80e trans stuck in forward gear no matter what it is in even reverse and it seems like it is stuck in forward gear when in park also?
Re: 4L80E Transmission Problems Dennis Key 3-13-08  
I have a 1995 Siverdola with this tranmission. I have to keep adjust shift cable to have high gear. It works fine one time, next no shift. Rebuilt tran. from Napaand warreny gone HELP!!!
Re: 4L80E Transmission Problems Fred Altamirano 8-16-11  
Just installed the transmission that was rebuilt by a local shop Everything went well until 3 days of useage my customer came back and complained the tranny leaksfron the tailshaft I inspected and found out that the rear seal was just dangling from the output shaft this clearly is the problem before i just put another one in and have the same problem come back can anyone help me out and explain why this seal is failing The truck is a 2001 chevrolet 2500HD with the 6.0 motor i beleive 2wd HELP
Re: 4L80E Transmission Problems wallace 8-14-11  
I have a 98 3/4 ton chevy 2wd 4l80e that we did a full rebuild on minus the valve body, only new solenoids, separator plate and gasket. Everything works great after rebuild, except its blowing fluid out of the vent. New converter, flexplate, bushings, clutches, seals... slight buzzing and vibration from dust cover area below converter. Cooler lines aren't clogged and problems starts almost immediately after startup, even when cold. (10 secomds after startup) please help. Thanks!
Re: 4L80E Transmission Problems tony 9-13-11  
2000 chevy 2500 shifts out overdrive after 10 miles will not shift back it wil do the same after you shut off truck then go agian 5.7 eng
Re: 4L80E Transmission Problems bernie 9-30-11  
I have no park. iwas told that it works witch a parking control module where is it mounted and how does it work
Re: 4L80E Transmission Problems bob 10-8-11  
A 99 3/4 ton 7.3 truck 12 shift code has no 3rd gear funny thing is that wen the motor srarts and dies it does this is it trhe pcm or wat help please
Re: 4L80E Transmission Problems Jim 10-4-11  
I have a Chevy silverado 2500 1993
the problem is no 1st and overdrive
what to do?

please Help
Re: 4L80E Transmission Problems Albert Bosch 8-11-11  
I have a 2000 gmc Sierra 6 ltr When pulling a load it dosnt downshift the way it used to. When pulling a hill from a stop the rpms don't come up any higher than 2500
Re: 4L80E Transmission Problems Gary 6-6-11  
1995 GMC 6.5 turbo deisel no reverse and it is stuck in drive even when in neutral or park-can anyone tell me how to fix
Re: 4L80E Transmission Problems Henry 11-15-10  
How do we fit these problems, is there to make these 4l80e transmission like a 700r4 no electronics. think about It...henry
Re: 4L80E Transmission Problems Ed 11-11-10  
I have a 2oo model trans out of a motorhome-when in park car still moves-it looks like the trans didn't come equipped with a parking pawl-did GM make them this way?
Re: 4L80E Transmission Problems RICHARD MAYNE 11-29-10  
I have a 1999 with a 6.5 turbo diesel my transmission 4L80E shifts very hard and my boost turbo sensor the check engine light is on and it says transmission pressure solinide and the turbo boost senser the transmission solinide was changed and the turbo boost senser too and it still shifts hard i would like to know if it is a electrical problem can somebody help me
Re: 4L80E Transmission Problems Dax 12-4-10  
Hi i have a stage 3 b&m 4l80e and its doin the same thing as the factory one did.1st 3rd 4th and 5th gears work perfect but the 2ndgear is slippin and wont grab unless my foot is down, other then that is slips super bad and can't figure it out thanks, Dax
Re: 4L80E Transmission Problems john 2-16-11  
I have a gmc 1994 zr1 4x4 truck with a 4l80e trans when i try to take off from stop, i move about 15 feet and then i get a hard lockup and the motor dies ??
Re: 4L80E Transmission Problems james smith 2-2-11  
Hi there i was wondering if u got this fixed becuz i have a 93 gmc 3500 6.5l turbo diesel and i lost reverse but drive was ok and now its doing what my reverse would do it acts like it in nutral and just revs thanx
Re: 4L80E Transmission Problems Zsolt Sinko 12-2-11  
Hi i have a 93 K 2500 6.5 diesel 4x4 with a 4L60E trans. Problem changing to 4th.Changes fine thru all gears except 4th.I changed the computer was perfect for a while.If i disconnect the harness for a couple of hours work fine for a while. If anybody can help please email me back Thank you
Re: 4L80E Transmission Problems Joey B 1-18-12  
I have a 1997 GMC Sierra K2500, 5.7l V8. I had a blown head gasket and the motor filled with antifreeze(obviously). Beforehand I noticed there was some knocking and other various noises coming from the bottom of the motor too. Do you guys think it would be worth rebuilding the motor that has 160,000 miles on it or should I try and find a replacement I can just drop in? If I should replace it what are some options for motors that will bolt right to the tranny without a headache? Thank you much for your help.
Re: wanting to put a 76' h/o motor in a 96' z71. is motor compatible with 4l60e transmission? Ronald McNeely 9-29-13  
Please let me know asap.
Re: 4L80E Transmission question Jeremy Dalton 9-22-13  
I have a 4L 80E trans that I need to replace in a 95 3/4 ton 4x4. I found a reasonably price used motorhome trans with integrated parking brake on it...My question is what will it take to mate the new trans to my transfer case and make it work?
Re: 4L80E Transmission Problems Forest Wasson 8-13-14  
My motorhome takes off in 2nd gear and stays there. does the same if you shift it manually it has to be electrical it has power to the trans any ideas
2008 caprice v6 engine vehicle not reaching at 100kmspeed santhosh 1-29-15  
Dear sir my vehicle caprice 2008 v6
there is no dtc and accelaration not incressing more tha 80 kms
i replaced throttle body
Re: 4L80E Transmission Problems mark kohler 8-5-09  
98 3500hd the torq converter slips at 51 mph replaced break swich and it was fine till next day the back to the old problem any thoughts, thanks
Re: 4L80E Transmission Problems VERL 3-13-16  
Re: 4L80E Transmission Problems chance smith 8-10-13  
Trannybroke flex plate around crankshaft put new one in now there is asgudder??
Re: 4L80E Transmission Problems when u put it in reverse it stall out and cut off only in reverse Willie Brown 6-3-13  
I got chevy silverador 2500 2005 when I put it
in reverse it stall out and cuts off only in reverse.
Re: 4L80E Transmission Problems Austin 2-18-12  
I have a 2003 chevy 3500 dually i went out side and started it and when i went to shift it into drive it wouldnt move. the day before it was fine. Did the transmission go out or what happened any help would be greatly appreciated
Re: 4L80E Transmission Problems mike 1-25-12  
2000 sierra 4l60e Reverse works fine no foreword gears. Any ideas would help.
Re: 4L80E Transmission Problems josh 2-21-12  
I just had my transmission replaced and was running fine but now when i try to drive in any gear thr rpm's rev up and it takes a sec to get up to speed like its sliping or somthing what could this be?
Re: 4L80E Transmission Problems Pedro 2-22-12  
My 4l80e tranny is not letting me change out of gear and or get out go gear. It's stuck. Please help.
Re: 4L80E Transmission Problems Ron Wilson 7-17-12  
The snap ring broke in the intermediate clutch. What cause it to do that. I just overhaul the transmission.
Re: 4L80E Transmission Problems paul 10-25-10  
I have a 94 3/4 ton chevy that came out with a 4L80e tranny and a 6.5 turbo deisel. motor went bad and i put a carberated 454 and now the tranny wont shift.what can i do to fix the problems
Re: 4L80E Transmission Problems Hemicudajoe 9-26-10  
Have a 4l80e that has no reverse and no high gear there is a squeeling sound coming from trans when it trys to engague high gear
Re: 4L60E Transmission Problems Dustin 10-26-09  
I have a 1993 2wd chevy with a 350 and a 4l60 tranny, it only has reverse so i took it out, and i am wondering if puting a 700r in would work with all the plugs or would i have to put another 4l60 in it
Re: 4L80E Transmission Problems Clifford Bateman 10-22-09  
I have a 1993 2500 Chevy pickup, automatic transmission; MT1= Transmission, Auto, 4-SP, THM-R2 (4L80-E) 4-SPD A Trans (MT1)
Reverse gear went out suddenly, with no warning, while snow plowing. Oil is clean. All other gears function.
Could the problem be PCM or a bad shift Solenoid? Is there a way to diagnose without removing transmission?
Local guy just wants to rebuild it for $1300.00 with a 30 day warranty? I'm thinking that if I do this, I could still have the same problem and be out all that money if it's something minor.
Re: 4L80E Transmission Problems taylor 10-29-09  
Will a 2000 chevy silverado 1/2 ton transmission fit a 98 gmc seirra 1/2 ton
Re: 4L80E Transmission Problems darren smith 11-7-09  
Put 4l80e out of a 95 crew cab dually 4x4 in a 95 2500 4x4 and it will not move it feels like it is bound up in every gear even park? the tranny came out of a running truck when the truck is idling about 900 rpm when you put it in gear it drops to 700 rpm but it will not rev past 2000rpm it feels like the truck is bound up but it will roll easily. thanks for your time.
Re: 4L80E Transmission Problems james cullum 1-6-10  
Transmission won't shift in first
Re: 4L80E Transmission Problems Mikie 11-14-09  
I have a 1999 2wd chevy 2500 with a 5.7 vortec. the tranny shifts fine when i first drive and after 15 mins or so it loses overdrive so i drive it in 3rd gear. today it started to slip in and out of gear so i stopped and put lucas tranny fix in and made it home. shift selonoids or torque converter ? any ideas? thanks,
Re: 4l60e Transmission Problems robert 10-10-09  
I have a 96 gmc v8 and wont to know if the trany out of a 97 v6 will be the same
Re: 4L80E Transmission Problems kevin 9-17-09  
Some times when i stop, when i start to drive off my trans seems to slip or go into nutral for a second than its fine.
Re: 4L80E Transmission Problems bruce 9-8-09  
I have a 1990 chevy 1500 4x4 can you tell me why when takeing shifter out of park its really hard and i have no revers but all gears work fin shifts through all gears smooth i was told it could be my torque converter lock up. any help would be. great thanks. Bruce
Re: 4L80E Transmission Problems steve 8-8-09  
My 4L80E dont shift from second gear whats the prolem shop cant find it need help
Re: 4L80E Transmission Problems Cliff 9-10-09  
I have a 95 Chevy C2500 2wd pickup. It wont shift out of 2nd, tach and speedometer started acting funny prior to the trans problem. Is this a shift solenoid problem, or could it be an electrical problem. Anybody have an suggestions?
Re: 4L80E Transmission Problems janice 9-13-09  
1990 chevy 4x4tranmission.overdrive out.
dose not move in overdrive.could be dirt or filter.
Re: 4L80E Transmission Problems GARY 9-15-09  
I have a 97 k2500 when you go to talk off you have a skipping noise.
Re: 4L80E Transmission Problems Peter 1-24-10  
I have a 1998 GMC 3500 HD and the shift lever will not shift out of park
any ideas, someone just started to wire an electric brake controller in, dont know if its related?
Re: 4L80E Transmission Problems dave 1-31-10  
I have a 6.5 diesel 1994 with the 4L80E transmission behind it. 4 wheel drive. I found an automatic out of a 1992 2 wheel drive. Can I take the tail shaft off and it will bolt to my transfer case? Because I am told 1993-1994 diesel only and I want to make sure that the yrs won't be a problem. They are both the mt1 codes for the transmission.
Re: 4L80E Transmission Problems Philip Myers 5-23-10  
I have a P30 chevy 454 vortec with the 4L80E transmission. This thing pulls like a mule through all the gears,however regardless of what speed you are driving, whether you manually downshift or the program /throttle position tells trans to downshift to drive(3rd gear)vehicle will lose speed, and if you continue to press the accelerator, it will come all the way back to second gear. once you are back on level ground and it shifts into overdrive, it will take off like normal.Ive changed the input and output sensors and fluid.Still the same problem. Vehicle does not have to be under a overwhelming amount of load when doing this.Come to a complete stop,taking off,once again steady acceleration through all the gears, but loses speed whenever it has to downshift back to 3rd gear. What is my problem?
Re: 4L80E Transmission Problems RON 5-20-10  
I have a {recently purchased-with a non- working trans.}95 4L80E that does not engage in any gear. in drive it rocks truck with rev of engine. the convertor looks new, and fluid is clean
Re: 4L80E Transmission Problems brian 6-25-10  
My 40l60e transmission in my 98 chevy 4x4 will not engage any gear at all i changed the torque converter because it went out now it wont do anything at all
Re: 4L80E Transmission Problems Brad Parriette 6-27-10  
I have a 93 3/4 ton with the 4l80e. I replace the engine in the truck and replaced the fluid and filter in the tranny. Now with the truck back on the ground, it won't shift out of first gear at all. I need some ideas. I checked the speed sensor on the tranny and it seemed to be ok, no visible problems. Any help would be greatly appreciated.
Re: 4L80E Transmission Problems PETER SOTO 9-5-10  
I have a 1993 gmc 1 ton dually (4l80e). tranny will shift 1,2,3, no o.d. or reverse. Can anybody help me resolve this issue? tranny only has 16000 miles,but 4 years old so i have no warrenty. thank you...
Re: 4L80E Transmission Problems brad 6-27-10  
My 4l80e transmission has all 1,2,3,gears but you go to back up it will not go what is up with it. its like its stuck in two gears when you go to back up help
Re: 4L80E Transmission Problems Gary 5-14-10  
Re: 4L80E Transmission Problems Ryan 5-11-10  
1994 GMC sierra 3500, once starting the truck the speedometer wont work, breaklight stays on, and heater on work. when you drive it, it stays in 1st gear. Turn the truck off and back on a couple of times and everything works again. Is this a speedsensor problem???
Re: 4L80E Transmission Problems jimmy 3-16-10  
1995 3500 dually with 6.5 diesel, it shifts find into every gear but when im on the highway or driving 60 mph it seems like its slips in and out of gear. and also when i take my foot off the gas it seems like it shifts into nutural. help please
Re: 4L80E Transmission Problems robert c 3-4-10  
Computer stolen from 95 Gmc G30 Van
4.3 w/4l80 transmission replaced
computer with 16197427 does not
shift what is problem?
Re: 4L80E Transmission Problems tom c 3-31-10  
I have a 93 chevy 3500 4x4 with a 6.5 turbo diesel engine and the 4l80e transmition.the dipstick keeps popping out.i checked the ven hose on top of tranny it seemed to be clear unless where the metal small tube going into tranny is clogged,does anyone know why the dipstick keeps popping out
Re: 4L80E Transmission Problems jerry 4-3-10  
4l80e in my 96 jaguar xj12 fault light comes on after first startup.will not shift oout of 1st.pull over turn off and restart and she is fine for rest of day.

Re: 4L80E Transmission Problems Rob 4-27-10  
Dual Question one will a 1998 4l80 out of a 2500 6.0 ltr truck wrk in my 1995 Diesel truck and my 1995 truck works wonderfull but last haul i was pulling car trailer no biggie did not notice any problems now it seems to slip minorly in reverse first time moveing that day also in forward only once when cold, Any ideas Tired tranny ??
Re: 4L80E Transmission Problems jennifer 4-22-10  
4l80 wont shift into 2nd high reves in 1st an goes to 3 all other gears r fine if you manul sift 2nd is there. e-mail me at dustincolekimco@yahoo.com
Re: 4L80E Transmission Problems eric 10-15-05  
Have your shift solenoids changed. tthey cost about 30-40 bucks at a local auto parts store
Re: 4L80E Transmission Problems Pat 7-22-06  
Please give me more info a.s.a.p.
Re: 4L80E Transmission Problems Marlin 7-30-09  
4L80E trans not shifting correctly?


1). Check the computer connections to the transmission.

2). This worked for me:
take out the computer, spray the connectors and plugs with contact clean that was some silicon in it.
replace the computer and be on your way.
3). Also check to see if the computer is getting too hot. If you suspect it is place a bag ice on it and drive around. a friend of mine had this happan.

Best wihes,

Re: 4L80E Transmission Problems kenneth 10-7-07  
3500 pickup go,s in all drive gears fine but rev not working how to fix
92 3500 chevy
Re: 4L80E Transmission Problems Mark 10-20-11  
I'm having the same problem that you have on your Chevy. Did you ever get it fixed? Mine is a 2000 Chevy 3500 motorhome with the 7.4L 4L80. Once warm at highway speeds it shifts out of OD (4th) and won't go back in until I turn the ignition off and start again. Works fine for about 15-30min then does it again. Took it to the Transmission shop and had it serviced and they say everything is fine. I also notice my speedometer sticks at high speeds. I wondering if the speed sensor on the transmission could be bad. Any feedback? Thanks.
Re: 4L80E Transmission Problems Elden 7-2-06  
2000 Chev 3500,210,000 miles. Trans seems fine when accelerating.Then as rpms level out,trans seems to stall or slip.It will reengage when power is applied.
Re: 4L80E Transmission Problems Shawn 8-4-09  
The tranny fluid is coming out the vent on top. Can I find a rebuild or can this one get rebuilt
Re: 4L80E Transmission Problems hex 8-25-09  
Did you find out what was the problem with transmission leaking oil from the vent tube
Re: 4L80E Transmission Problems eric jones 2-21-07  
I have the same proplem. Trans seems fine when accelerating.Then as rpms level out,trans seems to stall or slip.It will reengage when power is applied.
Re: 4L80E Transmission Problems NEIL 5-11-09  
Re: 4L80E Transmission Problems Jim 2-3-08  
Your seals that you keep installing and they get blew out usely happeneds from two reason. 1st it wasn't installed correctly, 2nd that the tranny is getting hot and this will blow the seal every time, so if your not towing something then you have a flow problem to the cooler.Test your
flow with air hose to cooler lines ad
air to one side and see how the oil blews out the other line. It may be clogged.

Re: 4L80E Transmission Problems rude 4-24-09  
Do you feel any vibration?where are you getting the seal from?i would check the pump body bushing,behind the seal,also check the lug on the torque for wear.if both ok,replace seal w/factory 1 from your local dealer and coat outer seal surface with lock-tite and use proper seal installer.
Re: 4L80E Transmission Problems Mike 11-11-10  
On my 4L80E I'm having trouble plugging in the electronic control cable from the ECM into the transmission. The connector on the transmission pushes into the transmission when I try to plug the cable into it. How do you keep this from happening?
Re: 4L80E Transmission Problems Ralph 11-22-08  
I have 1991 Chevy 2500 4x4 5.7 gas motor.It had a 4L80E transmission.I Bought the truck without a tronsmission.
I have a transmission from a 4x4 1994 2500. Will this work,I have read where the force motors are't the same and takes a different ECM
Re: 4L80E Transmission Problems Gary 8-25-08  
If you still have your old trans take the pan off anf swap the wire harness fron your trans to the new while you have off the pan put new filter in the wire harness are same on the inside of the trans {i know because idid mine on 1992 3500 k cube truck the big plug pushes in to the inside of the trans be careful
Re: 4L80E Transmission Problems Tom Robertson 6-21-07  
I have the same problem. Did you ever figure out the problem and what to do to fix it?
Re: 4L80E Transmission Problems BRIAN 1-13-07  
I have a 1996 suburban with a 7.4 liter moter and a 4l80e transmission.It has reverse but no forward gears.Thecode comes up as a shift solenoid b electrical.code number p0758.Any info will help.
Re: 4L80E Transmission Problems bryon waters 6-11-11  
My 92 chevy 3500 will not shift into overdrive
Re: 4L80E Transmission Problems bonnie 6-20-09  
I have a 1997 chey 4x4 truck and only when i go lond trips in hot days it starts to shift hard,and I donnt know what to do, can you help
Re: 4L80E Transmission Problems Geo 7-30-07  
This is the most jacked up hijacked forum I have ever seen. Does anybody know what they are doing
Re: 4L60E Transmission Problems jason 5-9-08  
I recently took out the 4L60E trans. that had done gone bad in my 94 camaro and i replaced it with a 4L60E trans. i purchased from a friend of a friend. it came out of a wreaked 97 camaro, both camaros were powered by a 3.4L V-6. Knowing it was'nt the right thing to do, but in a have to situation i used the torque converter out of my car. NOTE: i drained it completely filled it with fluid and drained it again hoping to maybe flush it out if needed be.Please remember that was a have to situation. OK now the results... it would take the gears or 1st. and rev and back to park just fine sitin still.but drivin it,it would not shift out of first(fluid level good). So then i tried to maybe erase any bad trouble code it might be gettin,(i pulled the PCM/IGN fuse for a min. or two and now drivin down road it shifts from 1st to 2nd very hard at high RPMs(3500)and now it is hard to get to go into OD and also when comin to a complete stop or even puttin trans. back into park and back to drive again it does not seem to be going to 1st. it seems to be starting out in 2nd. or maybe even drive. Could anyone please be kind enough to help me out with this problem and if the torque converter is bad could it be causing all of these problems. thanks for your concern.
Re: 4L80E Transmission Problems caesar 5-18-07  
Will a 2000 chevy half ton suburban 4x4, transmission with a vorteck engine. fit a 94 chevy 1/2 ton z-71 with a 5.7 liter engine
Re: 4L80E Transmission Problems John 1-11-10  
I have a 2007 Chevy Silverado 1500 w/Vortec 4.6ltr V-8. Quad cab, 2WD. My wife was driving shift real hard when she went to pass somebody and then DRIVE went out!! Please help!!
Re: 4L80E Transmission Problems Brian 6-23-07  
92 G30 4L80E, hard shift from 1st to 2nd and it feels like it's slipping into d and od any idea's?, also my IAC is not engaging could these be related? thanks in advance
Re: 4L80E Transmission Problems Larry 1-11-09  
I have a 96 GMC Sierra Pickup 4x4 with the 4L60e Transmission in it that is slipping..I am thinking about buy a 94 Surburban with the 4L80e Transmission in it.... will it work in it...
Re: 4L80E Transmission Problems eric 11-24-10  
95 gmc 4l80e pulls in reverse but bareley tries to pull in 1234. Any ideas
Re: 4L80E Transmission Problems steve 11-21-09  
Your pump is bad
Re: 4L80E Transmission Problems Travis 3-17-09  

it sounds like it's the torque coverter, or your cooler check ball is not seating, that could cause the troque converter to drain back to your sump. thus would take it a couple min to fill up, acting like its low on fluid.
Re: 4L80E Transmission Problems John Monroe 1-31-10  
I have the same problem With no reverse.everything else is fine,Did you find out what the problem was?
Re: 4L80E Transmission Problems greg 1-9-08  
Trans wont shift into higher gears dont slip under pressure
Re: 4L80E Transmission Problems jeff 2-25-09  
1st to 2nd gmc2500 4x4 hard shift bought new shift selnoid not sure if thhats the problem but i cant find it is inside thhe tranny
Re: 4L80E Transmission Problems danny macey 11-25-09  
I have a 1992 chevy 2500 truck and reverce went clunk and does not work now all foward gear are fine also whats wrong can i put a 1986 turbo 400 in its place and will it work it has vacum mogulater and if i use other conver from truck its 2 wheel drive hope you can help thanks
Re: 4L80E Transmission Problems Mike 7-16-09  
I have 5.7 Vortec with 4L80E Trans., computer and wiring harness from a 99 3500 GMC, would like to install motor/trans. combo in early(pre-computer/emisson)Chevy Camaro, question is do I need computer for trans to operate properly? There will be no fuel injection.
Re: 4L80E Transmission Problems cheryl 4-20-10  
My 2000 GMC 4L80E won't go in reverse. I have done a complete tranny overhaul what is causing this eproblem? Please advise how to correct this problem
Re: 4L80E Transmission Problems cheryl 4-20-10  
Vehichle won't go inverse. a full tranny overhaul still no backward action. please advise on how to correct the problem! Thank you.
Re: 4L80E Transmission Problems Gary 5-25-09  
Mine does the same. Did you get an answer?
Re: 4L80E Transmission Problems GREG 1-31-10  
Does Anyone Know Why Gear Select,Tach And Speedometer Quits Off And On 1995 Gmc Sierra
Re: 4L80E Transmission Problems hassan glaster 1-20-09  
I have a 94 yukon 4x4 im sure it uses the 4l80e my problem is it will not move in reverse all i hear is engine rev and a wissle noise
Re: 4L80E Transmission Problems chris 10-4-10  
Try unpluging trans wireing harness for a day or two it worked on my brothers 99 chevy after that it was fine
Re: 4L80E Transmission Problems Rod Nelson 10-2-10  
My transmission does not shift all the time from 2 to 3-4 it is 1997 4/4 1500.Your help would be appreceated.
Re: 4L80E Transmission Problems mike 7-20-11  
Motor mount on left side of engine is stretched or broke, if you use a solid transmission mount, always use a left sided solid mount
Re: 4L80E Transmission Problems Ted Marks 5-15-12  
1996 K3500 454 4x4 4L80E truck and trans runs like brand new- for 10-15 miles then downshifts to 3 and will stay there till you stop the engine and restart then like brand new for 10-15 miles. I replaced both speed sensors,throdle position sensor,both shift solenoids this is a factory reman with not very many miles also when it downshifts it shifts hard but shifts. this thing is not slipping at all I can pull a 3 ton trailer up the mountin in overdrive no problem as long as it is inside its 10-15 mile range. anyone have any ideas?
Re: 4L80E Transmission Problems David Modelski 7-30-13  
1998Chevy V-6 1/2 ton express cargo van
No reverse gear? Can it be repaired without removing trans?
Re: 4L80E Transmission Problems Daryl 1-17-10  
I have a 4L80E in a 1991 Chevrolet step van. It wont shift into reverse. The forward gears are fine. Just no reverse.

Looking for suggestions of what the problem might be
Re: 4L80E Transmission Problems chris kleve 2-8-09  
Hi i have a 96 g30 van that shifts very hard into 2nd gear then wont down shift or up shift at all untill park it and shut it down for a while then will shift from first to 2 very hard but wont go into 3 or od. Also the speedometer and ABS check light is on. the only code it pops is 24 and i replace both trany sensors and cleaned all electrical fittings please help.
Re: 4L80E Transmission Problems buddy 1-20-09  
I have a 4l80e that will not go into reverse but shifts good. i was taking this tran and 454 that it was matched with out of a dually that it was factory installed and putting it in a 87 swb 1/2 ton. any suggetstion on what would only stop the reverse gear? thanks for your input.
Re: 4L80E Transmission Problems Brandon C. 3-4-12  
Hello i have a 1994 GMC Sierra Ext. 5.7l 350 T.B.I when i drive the truck has to get up to high RPMs before it shifts (3000-3500) in any gear and its sluggish on the acceleration it never done this before any information would be really awesome or point me in the right directon. Thank you for your time
Re: 4L80E Transmission Problems collin 1-5-12  
Hey mr lt1. i have an lq4 with a 4l80e and it slips in 4th when i am going about 50-60 mph. after that its fine. so its not a matter of getting into 4th is just driving at low rmps in 4th. what do you think? i dont know much about transmissions so it would be awesome to hear what you would have to say.
Re: 4L80E Transmission Problems Randy 4-8-17  
The problem is your ignition switch take a volt meter and check the trans fuse with the volt meter on the fuse turn your ignition on and off it should always show 12 volts if at anytime you see less then 12 like 6-8 volts you have a bad ignition switch 95 is famous for it
Re: 4L80E Transmission Problems jeff 12-14-08  
About the 4l80e. my 91 rs camaro runs okay when its cold but when hot it goes basically like its in neutral. did you find out what was wrong?
Re: 4L80E Transmission Problems steve 8-1-13  
Transmission shifts fine when gets hot stays in 2nd
Re: 4L80E Transmission Problems nestor t. derio 7-20-10  
Have a 3500 1999 5.7L xpress van's transmission is a 4L80 have repaired three times and the problem is that it picks up a lot of burning temperature and transmission oil can help me?
98 3500 chevy 6.5 diesal transmision proble jereme 12-28-11  
Transmission seems to be stuck in first wont go faster than 20 mph speedometer quit working and rpms dont show either cheched fuses and connection to trans any one have any answers for my prblem please email me
Re: 4L80E Transmission Problems Alex Dodson 10-3-10  
The unit needs to be complete;y rebuilt from the ground up.
Re: 4L80E Transmission Problems Dustin 12-31-09  
I have a 1993 Chevy C3500 with a 6.5 TD it has a 4l80e tranny that will shift hard 123 then will not lock up in 4th then will not go in to 5th If anybody can help please email me back Thank you
Re: 4L80E Transmission Problems bruce 9-15-09  
After 2nd gear all other gears slip or is gone does it need rebuilt again
Re: 4L80E Transmission Problems zach 1-25-10  
Have u fixed this problem yet i got the same problem with my truck i have a 2001 2500hd also let me know thanks
Re: 4L80E Transmission Problems Glenn 11-27-09  
I have the same problem. but with my truck it only hapens after hard excelaration. still looking for the problem. what works for me is on excel, keep it below 2100 rpms. and if it will not hit 4th I shut it down for one min. then it hits 4th. good luck
Re: 4L80E Transmission Problems billy 11-17-10  
Buildin prussur in case is only way to blow dipstick out. vent is the means of pressure release so if its not stopped up dipstick would stay in
Re: 4L80E Transmission Problems brad 8-8-10  
The snap ring as been plowed of you will have to pull it and have it fixed
Re: 4L80E Transmission Problems james oliver 11-3-10  
Problem changing to 4th or overdrive. Changes fine thru all gears except overdrive.Changes every once in a while.
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