If you intend on drag racing the car, you may want to look at going to a different dif. alltogether. After one season of racing, my stock traction lock dif. has started to wear out. I've noticed alot of play in the spyder gears, as well as I believe one wheel is starting to spin more in the waterbox when doing a burn out. ie weak traction lock spring. Just my 2 centsultraclyde said: