First thing to do is I.D. your axle. Get the Dana BOM # off the silver tag or off of the RH axle tube. It will be 6#'s followed by a dash and 1 more #. You either have a Dana 60 or 70-2U. Is yours semi or full float? The least expensive way is to find one with factory limited slip. A-lot of guys go with an ARB air locker (full locker) because there's one for factory 32 spline axle shafts. I'm going with a Tru-Trac limited slip 70 with 35 spline shafts from Yukon or similar. I like how the TT performs better in sand/snow/ice. Personal preference.