[landmass]

Thanks, all of you, for your comments. I'm still confused as to why the size of the rear end would matter. It is a Ford 9" rear end with a Detroit Eaton Truetrac installed. I went to the track the other night, and during the burnout, the car stood still for about one second before going slightly to the right. When I look looked at the GoPro video, it showed that I jerk the wheel about 6 inches to the left under the pressure of the launch. I think this is what started the rear going to the right. But, then I was thinking how could that cause that when the car was sitting still - no forward movement for the turn to come into play - right? Would a turn of the steering wheel cause that when the car is NOT moving forward? I could hold the steering wheel much lower, so the force of launch wouldn't jerk the wheel to the left, but more straight back...