On the 6.0l, I have a customer with a 24v Cummins with a P pump swap. Problem is with the Cummins, the stock Ford shift points are obviously wrong. Can I adjust trans functions on this 03 6.0l through the tcm, or do I have to do it through the ecm? So if it is seperate through the tcm, I'm assuming I can license the Tcm seperate from the ecm?