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Anyone notice the positraction(lock) on our mustangs suck.... I had my rear diffrential rebuilt(shimmed up) .
One wheel does not spin without the other.
I don't know, maybe I'm a little WE-TARD-ED but i run my stang at the track a good bit and am so far good with the locker. I do burnouts and the rear end drifts just like it should. I drop at the line and it pulls strait as hell all the way to the other end. In fact the one time I didn't heat up the tires it got scary sideways when it shifted from first to second, a sure sign of a descent locker because an open diff would have just lit up the left rear.
I am quite happy with the rear diff. Seems to stay locked even when I punch it around a corner. I get the tail sideways at will. Way fun for an 06' factory car.