fast92lt1rs

Ok, I was told that the PCM's and transmissions from 94 and 95 were not interchangeable. For example you can't use a 94 trans with a 95 PCM and also the other way around because the "method of communication" between the two is different and not compatible. I was told that the PCM would get damaged. Is that true? If it were true, would it be possible to take all of the internal components from a 94 (the pressure switch, solenoids, TCC valve and the sensors and swap them into a 95 Trans. I know that the internal harness is the same for both because they fit 93 and up. The reason that I am asking this is because I have a 94 engine that has been turned into a 383, the 94 PCM and 94 4L60E that I want to put into a 95 Z28. The 94 trans has had a few problems in the past and the trans in the 95 has never had any problems. I would like to use that trans if possible. If they are compatible then there is no problem. If they are not then that is why I am asking if the electrical components can be switched. Sorry for the long post. I just wanted to give as much detail as possible.
Thanks
Pete
1995383Z28

Injuneer

Wow.... a sextuple post, and on the wrong forum. Moving to "Drivetrain".

Please help me by deleting your duplicate posts

sbs

The 94 tranny can be made to work with a 95 computer and vice versa. I've seen posts from madwolf on how to do it. You can contact him at madz28.com

fast92lt1rs

Great, thanks for the reply. Sorry for the multiple posts. My computer froze and I hit post a few times.

rngilliland

The 94 and 95 PCMs are the same. The only difference is the program. The 95 trans uses a different converter lockup. If you use the 95 trans with a 95 wireing harness and a 95 program flashed into the PCM it should work fine. The wireing harness I am talking about is the one that goes from the PCM to the trans. I think it has an additional wire compared to the 94 harness because of the different lockup.