I'm sorry but I've read this thread up to page 13 and have been wondering what this studdering problem is. Does it occur when you are starting to move the car. I know for my car if I try to go too low it starts to shake a little and that has a huge surge of power pulling me above the 1.5k RPM mark even though I was only trying for 1k, even though I am no longer on the clutch or gas.