4l60e to a 4l80e. i need some info plz!!!
 

well my 4l60e is on its way out i think. and im thinkin bout goin to a 4l80e. but im not sure of a few things.

1- will the computer be the same and how bout the wiring harness hook ups?
2- will my 4l60e crossmember work with it?
3- i think the drive shaft will be the same but not sure?
4- what is the best year to put in a 95TA?
5- will me 4l60e converter work?
6- and if i have forgot anything plz put it out there

thanks guys

t t t

I don't know the exact details of an f-body or lt-1 swap, but I did it on my truck and here's what I know:

1 - no, the PCM controls each differently, and the harnesses are different (80E requires 2 VSS's vs the 60E's 1, and the round green connector is configured differently)
2 - no, the trannies are different lengths
3 - no, the trannies are different lengths. You might be able to change the yoke, I know the 2wd truck guys can change yokes and be fine. The output shafts on the 60E vs 80E have different spline counts and the 80E is larger IIRC.
4 - not sure
5 - no

ok i was going to do the same swap on my ls1 car but decided to sell the car. I order the harness adapter from speartech.com also you are going to need a converter and a flex plate . and the dimemsions of the tranny are different 4l80e is longer so you need to make a crossmember or modify it and a shorter shaft.

well hell it sounds like im goin to stay with the 4l60e. all that is too much work for a car with just a few mods

I just ordered a 4l80-e tranny that comes with everything I need. These are the parts it comes with:
# Wire Harness
# Crank Spacer & Bolts
# Crossmember
# Custom Driveline Yoke
# Dip Stick Tub
# Transmission Mount
# Connection Lines & Fittings
# Transmission
# Torque Converter Shield

The yoke allows you to use your current driveshaft. I also had to get another torque converter.