looking to put in a rear locker. my LS 3:73 is o.k. but once one tire spins the other laughs at it. was looking at the powertrax no slip but cant seem to find for my year. is there any thing like the G80 GM puts in their trux made for fords that are quiet. also what would the spline count be 8.8 3:73LS. shaft size? any body in my situation?