thanks ed, your hired lol. the car is all new. tom shined some light on it and it helped. i think it's dead hooking from what you said. i don't see any tracks on the driveway and the video shows the tire wraping up then it starts shaking. how much power are you talking about when you say hi hp car? what happens when you run wheelie bars and it starts shaking? do you think 1psi in the tires is a big adjustment? i moved the front of the bars one hole up and put a lower gear in it and it help but it's still doing it. from what i get from you ed, is i should of went up on the launch rpm's not down to get the tire speed up?. thanks for the input.