I found a pretty good deal on a M6 car and was thinking of swapping the M6 into my car and putting the4L60E from mine into it. Would the main wiring harness be the same for both cars? I know some fo the sensor pigtails have to be swapped, just curious about that main harness. Thanks, Roy

 

Nope, T-56 will have a cags connector, reverse lights and reverse lock out solinoid plug. The 4L60E will have a Tourque convertor lock plug and not sure what else.