We go through it all the time with the Shelby trucks and the transmissions needing updates.The transmission tuning is huge with Fords. The factory calibration is so wonky. I hated how mine would act in traffic. If I stabbed the gas, let off for a second then stabbed the gas again it would fall flat on it's face for a half second before reacting. With my VMP tune it reacts instantly just like it is supposed to.