as above i have a j reg rs 2000 track car and last track day it started pulling badly to left and right when i boot it or go slow ........ive changed the bottom arms and wheel bearings......still the same i was thinking maybe engine or gearbox mount but it really is bad when the car is on axle stands and i release clutch there sounds like a loud banging coming from gearbox area,could it be diff in box or a shaft ?????? i know it needs box removing to kow for sure ,but just wondering if anyone else has had the same problems..........cheers jeff