4L80-E transmission won't shift

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4L80-E transmission won't shift

Home > Discussion Forum > Mechanic's Corner - Transmissions

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All Messages in Thread	Author	Date
4L80-E transmission won't shift	Ken	9-28-07
I have a 94 Chevy G30 bus that won't shift out of 1st gear. I want to change the shift solenoid but I need an idea where they are located on the trans.
Re: 4L80-E transmission won't shift	BUBBA THE BUS TECH	9-29-07
This a no big deal repair, its just messy oily and a pain in the neck from laying on the ground. Drop the pan, you will need to cut and splice wiring in the pan on the valve body. re rout the wires and length them the same way as stock (important). Make sure that the o rings and all the plastic pieces come out of the bores. To get replacment parts, GM can provide. In my area Larry's transmision supply will sell to anyone and is a magor supplier to rebuilders. Much much cheaper. And as above if there is a problem with these it should show as a code in the computer
Re: 4L80-E transmission won't shift	Herb	9-29-07
All the solenoids are in the pan. To replace them all is about $90. You're probably in 2nd, it will go into limp mode if a code is stored.
Re: 4L80-E transmission won't shift	wrench	9-29-07
On that one, if you're not handy mechanic & have the proper library you going to trow parts in it & may be never solve the problem. FWIW wrench
Wiring diagram for 4L60E transmission	Jamie Lipsett	3-12-08
Wires got torn off going to transmission. I have to rewire transmission from controller, If you have any wiring diagrams for transmission could you please email them or let me know please.
Re: 4L80-E transmission shifts out of overdrive	mike moran	9-29-07
I reset code and will run in overdrive for awhile then will shift out I have 2000 express 3500 deisel 60.l any help thanxs mike
Re: 4L80-E transmission won't shift	ramrod	12-18-07
I have a 1994 chev 3500 with a 454 in it. It has a 4L80E trans that periodiclly will not shift into 3 or over drive. I have replaced both speed sensors and the TPS with a short period of success. Any help welcome
Re: 4L80-E transmission won't shift	BUBBA THE BUS TECH	10-3-07
The code is critical. What code is it? It will tell us whether it has an electrical or solinoid problem or even a sensor.
Re: 4L80-E transmission won't shift	F'd 3/4 ton burb	12-14-07
I have a 1995 k2500 suburban and it will start out in 1st and slide in to 2nd, 3rd and 4th do not work along with reverse. some times if i manually shift from 1st to 2nd and let of at time of shift it feels firm but slowly looses holding power.. any help?
Re: 4L80-E transmission won't shift	Michelle	12-9-07
I have a 4L80E transmission and it will not shift automatically from 2nd to 1st. I am tired of having to manually shift. Please help?????
Re: 4L80-E transmission won't shift	hugo de leon	11-26-07
My 4l80e trans wont shift into overdrive
Re: 4L80-E transmission won't shift	ken	1-27-08
I HAVE A 93 DUALLY 4X4. EVERYTHING WORKS FINE, EXCEPT WON'T SHIFT INTO OVER DRIVE, RECIENTLY WOULDN'T SHIFT PAST SECOND, FUSE NOT MAKEING CONNECTION (MARKED TRANS) WAS FOUND TO BE THE PROBLEM. ANY IDEAS ON THIS ONE?
Re: 4L80-E transmission won't shift	Don Manifold	8-17-08
Ken I have '91 3500 w/454/4l80e with same problem. Shops unable to resolve, trans fuse problem seems possible. Fuse is fine, can you elaberate on what fixed your shift prob? Stressed!!

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