I have a 1994 2500 truck with a 4L80E that has given up the ghost. I have a 1995 4L80E transmission out of a 2500. Is the wiring the same between the two? Do they interchange. I searched through 10 pages of the search with no definite answer.

Thanks to anyone that can help.

 

should be the same. i think the only changes were up in the later years and had to do with the cooler lines. mines a 95ish

 

Should be a direct swap. My 4L80E is from a 96 and I believe its the same too. They didn't start the cooler line quick connect slow pain in the **** SOB where did that clip go disconnects until 97 or 98.

 

those clips aren't supposed to be re-used according to the manual i read

 

Yes, it will work.
- You can't use a 91 or 92 because they have 292.5Hz. Force motor and wrong connector.
- You can't use a 93 because even though it has the right connector, has wrong force motor.
- 1994 and up have the right connector and the 614Hz. force motor, but the case design changed in 97.

These issues can be overcame, but at additional expense.

Easy: 94-96 4L80-E (MT1) and it'll bolt right up
(1997 and higher will require Sonnax line adapter for rear oil return)
Better: 1999+ 4L80-E (MT1) has improved gears (wider/stronger) and wider 2nd band
Better: 2000+ 4L80-E (MT1) now have top center mounting hole
Best: 2001+ 4L80-E (MT1) have improved overdrive roller clutch to prevent roller skew

 

Thanks guys the swap went perfect and you all were right. James B, thats some extremely handy information you just posted. Thanks to all you guys that responded.