I put in a new overdrive shift module and od worked the first time, than turned the truck around and headed back to the shop and no od. Checked all the wiring, its good. Have already tried grounding out **** near everything it seams like and cant get overdrive to work. Put in a new trans temp sensor, that didnt fix anything.With that said can i use govenor pressure to bypass the pcm and the overdrive shift module to see if my overdrive works?

thanks

 

Sure, just follow the writeup in the sticky.