My Chrysler lately has been acting up. Sometimes at a stop, the transmission doesn't shift to a lower gear. Taking off is slow cause the gear is like frozen in a higher gear. After I pull over, shut down & restart, problem is sliced. I sent out the TCM, it was repaired from a " clearsum " code. Still had the problem. I sent out the ecm for possible repair, it came back with no issues. I not a rich guy, & would like to fix the problem myself, if I can find the problem. Any suggestions ???