GM 8.5 / 8.6 inch Differential Bearing Kit, disc brake axle type, 1999 - 2005Transtar now carries the differential bearing kit for the popular GM 8.5 and 8.6 inch disc brake type rear differential assemblies. This premium kit includes internal bearings, shims, seals, ring gear bolts, crush sleeve, pinion nut, gear marking compound, and silicone RTV gasket maker.