I have installed the kit and have driven the car 300 miles with it in. I have noticed a nice cleaan faster shift pattern. However when I first put it in drive it makes a hard bang that shakes the car. All it seems to down shift really hard and up shift u cant feel. The shift points have changed also. My car used to shift at about 63 mph now it is at about 57 mph. It does feel alot stronger though and like it always wants to go. I am just concerned about the banging.