How to rebuild a 8 3/4 Borg Warner Posi Unit

Sorry disagree remaching the cone is no different than machining a rotor. For a daily driver 450 bucks for a new posi + new bearings is insane!!!!!! VS 20 bucks in gear oil and a couple hours.. I have done them I know they work! If i'm shade tree I'm shade tree I still rebuild transmissions too.