Ross@Flyindiesel
New member
couldnt really find the answer i was looking for durning the search so this is why i posted. anyways as some might know we have been trying to determine why my brothers tranny has acted up since day one of the rebuild. as i havent gotten pressures yet (been busy) i wanted to try and eliminate the pcm and wiring harness just to be sure before we go spend more money on a new tranny. since the tcm is located in the pcm can we swap a pcm out of any 6.0 and put in it there just to see if it fixes it. let me say that he also has a 06 motor in this 04 truck with 06 wiring harness for the motor. making everything stock from both pcm's would it work?
his tranny acts up in stock mode as well which is why i want to swap the pcms just to be sure. this truck sat in a field for 3 years before we got to it and never touched the pcm or tranny wiring harness which is why i want to rule them out first since i have access to those parts without spending money. and tranny only acts up durning relearn process and then all shifts are weak after that which is another reason why i want to check those.
Final reason i want to check mainly the wiring harness is sometimes the TOW/HAUL will work going down the road. sometimes you have to stop, put it in park, hit the tow/haul, then go back to driving just for tow/haul which is really odd that it will do it sometimes and not others which makes me think its not in the tranny buy in the other 2. so with all that said will the truck run and operate with a pcm say out of an 05 that is completely stock or will we need a pcm for an 04 truck
his tranny acts up in stock mode as well which is why i want to swap the pcms just to be sure. this truck sat in a field for 3 years before we got to it and never touched the pcm or tranny wiring harness which is why i want to rule them out first since i have access to those parts without spending money. and tranny only acts up durning relearn process and then all shifts are weak after that which is another reason why i want to check those.
Final reason i want to check mainly the wiring harness is sometimes the TOW/HAUL will work going down the road. sometimes you have to stop, put it in park, hit the tow/haul, then go back to driving just for tow/haul which is really odd that it will do it sometimes and not others which makes me think its not in the tranny buy in the other 2. so with all that said will the truck run and operate with a pcm say out of an 05 that is completely stock or will we need a pcm for an 04 truck
