I got a P0750 code and started throwing parts at it and still haven't found the solution and I am hoping you guys can help. I changed the shift solenoid pack and the PCM and still have the same problem. The transmission shop is at a loss. They ohm checked the a wiring harness and said it's good. I don't know what to do next. The truck is a 2006 1500 5.7L with only 98000 on it. Do you have any ideas of where to go next? Thanks in advance.