I am thinking of swaping in a non-electronic trans into my truck and was wondering what I have to do to make the PCM happy. Can my tuner tune the PCM or re-flash it so it does not worry about the trans or do I have to swap the PCM's?

 

There are stand alone PCM and harness out there, talk to your tuner about removing the tranny. I know Jesse at Wait4Me Performance can make you a stand alone harness from your orginal.