Just recently my 2004, 24 vavle blew up, I replace the 24 valve with a 95, 12 valve motor. I reused my 04 ecm and harnesses for the 12 valve. Eveything is working well except my transnmission dont shift automaticly and overdrive doesnt work. I need help 45 mph aint doing it!!!

 

You will probably have to get a standalone 48RE controller.

Not sure if you could get all the signals required for the stock PCM to work correctly.

 

you wont get the stock one to work . the 12v doesnt have all the sensors went thru that when we 12v the 03

 

ok thanks but i have no clue how to do any of that or where to start

 

Thought I had a solution, but it only works on 45RFE

Anyone else know where to get the 48RE standalone controller?