What year(s) transmission can I use in this truck?

1993 CHEVROLET 3500

175,000 MILES • 6.2L • V8 • 2WD • AUTOMATIC

DOUGYDO

MEMBER
2 POSTS

The truck listed above 1 ton with a 6.2 L diesel and a 4L80E automatic transmission. No reverse and no overdrive… Works in the other gears… My question is, if I replace the transmission what years of transmissions can I use?

Jul 23, 2022 at 8:46 AM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

I believe any 4L80E automatic that has the same electrical connector and pin count will work. Also, the torque converter must be changed out as well because the diesel converter is different than a gas model.

Here are two generic videos to help and how to swap out the transmission in your truck in the diagrams below:

https://youtu.be/ZC7xHVMKLRw

and

https://youtu.be/3vJAojsrfuU

Check out the diagrams (below). Please let us know what happens.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
Click here to log in and view diagram.

Jul 24, 2022 at 10:33 AM

DOUGYDO

MEMBER
2 POSTS

If I remove the transmission from my diesel and replace it with one from a gas motor, can I use the old torque converter in the new transmission?

Jul 24, 2022 at 11:20 AM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

I wouldn't because it can have metal inside from the bad transmission, I would try to find one from a diesel.

Jul 24, 2022 at 12:18 PM