I know the 95+ use OBD-I computers, with the OBD-II connector. I also know that the 95+ 4L60E Trannies use PWM for the TCC, whereas the 94's don't. Because trying to find a replacement tranny for my 94 is a PITA, What's involved in getting a 95+ to work? Can I reflash my ECM with code from a 95+ vehicle, or are there wiring changes and/or mechanical (bellhousing, case length, different splines, etc...) changes...

Thanks in advance

 

I think that the 94 has a single plug harness and the 95 is a double plug and if I am not mistaken it has something to do with the lock up on the Converter,

I could be wong so check it out.

hope this help at leat point you in the right direction.

 

I had a 96 4l60e in my 94. Works fine. You need to change the harness in the tranny pan and it will work great.

 

What do you mean by change the harness? In other words take off the 95+ harness and plug your 94 harness in?

Do you have any pics or anything? Thanks in advance!

 

You will need reprogramming for a 95 tranny and run a wire from the pcm to the tranny connector. It's the PWM wire. Check shoebox's website for diagrams.