USA Standard Master Overhaul kit for the GM 8.5 differential with HD posi or locker. USA Standard Master Overhaul kits keep with the brands low cost, quality, tradition by giving you the small parts you need at a price that can?t be beat. This kit is used in 8.5" differentials using a Yukon Dura Grip, Eaton posi, ValueTrac, True Trac, Pro-Series Auburn, Detroit Locker or standard carrier with large bearing journals. USA standard install kit offers a lower cost alternative when price must be kept low. This kit uses Koyo bearings and races. Included are carrier bearings and races, pinion bearings and races, pinion seal, complete shim kit, ring gear bolts, pinion nut, crush sleeve (if applicable), oil baffles and slingers (if applicable), threading locking compound, marking compound with brush and gasket.