Whats everone working on?

I am going to pull the valvebody out of the car, it was sticking in first gear, when put in neautral and reverse. Shifted fine from first to second and second to third, I went to bring rpms up on the starting line after activating the trans brake , and the car backed up out of the lights??? At the end of the track it went back to working totally fine. I think a small piece of dirt or metal is hanging up the valve body..