detroit locker s do not like them much .i went to one so i could run 35 spline axles. if you get on the car and let of it the locker has free play in both wheels . if you get back on the car you will ruin you trans. i blew out 2 gear with one. a ford 4 spider clutch true track set up right will be all you will need. i have put alot of power thru one have had the same one for over 20 years