We need a transmission sub forum here ! Sweetk30 I seen your post on the Edelbrock forum on the US Shift TC how did that work out for you ? TC is the next step in my build (4L60E) and read about the TPS interference issues... I see Edelbrock (TCI) has released one for the PF4 but can't find any feedback on it, not dropping $900 clams on something I have no feedback on...