i'm having problems with the tranny not shifting into 2nd under wot conditions at the track. i logged a run with datamaster, and after launching the vehicle speed is stuck at 4mph and once the motor hits the rev limiter, error 72 "output speed loss" shows up.

i'm gonna try replacing the vss sensor, but i'm not convinced its the problem. this only happens at the track, where the car sticks when leaving, on the street, the wheels spin some and the car will shift properly.

anyone have any ideas??? the car is a 97 t/a with a yank ss 3600 converter and obdi conversion.