yea, that may be all your feeling......what was the code you got.....p047?.... the ebp controll valve is used strictly to warm the motor and coolant faster. it is not even allowed to function at high load or high speed, so i wouldnt think that would be affecting you. ask any of the guys here who have driven both trans types....and they will tell you the 6 speed is a totally different feeling beast......and to top that off it has low gears through second and then spaces them out more to allow maximum take off torque without having to have a 550 gear in the rear end.....so they dont drive the same as the auto does.....let me know if i can help ya with anything else on it, and if you get me the code, i can let you know what i think......Marc