I just put on a Transgo with the firmest settings, and oh my god what a difference, the shifts are so fast and firm its great. I ran a 13.5-13.6 before this and im guessing 2-3 tenths easy, this is a must for an AOD, it feels like a manual now, I even had my buddy who is anti AOD drive it and he said it feels real nice! Everybody always told me the stock AOD left alot to be desired, after adding a Shiftkit, and a 3000 stall i see what they mean!