skylordd

I recently replaced the engine in my 2005 TT due to high mileage. Car was disconnected from the battery as well as the ECM for 2 weeks. Tranny seems to shift erratically from time to time. Mainly hard shifts between 3rd and 4th gear. Does programming direct how the tranny shifts ? Trans shifted perfectly prior to engine swap. This is a FWD only car. No codes or anything like that. Anyone offer any suggestions ? thanks in advance. Anyone know if the Ross Tech software deals with trans programming ?