This is a genuine AAM differential bearing and seal kit for the GM 14 bolt rear end with the 10.5 ring gear from 1988-2011. This kit includes all the necessary bearings, pinion seal, crush sleeve, and pinion nut. This kit comes with the later 26064030 pinion seal which is for the yoke with the wear sleeve made on it (1998 and newer). We can switch it out out for the 2286 pinion seal which fits the yoke without the factory wear sleeve(1988-1997), just put a note in with your order. Also this kit can be used in trucks as far back as 1972 if you use or purchase the later pinion cage part number 26061404. PLEASE NOT THAT THIS KIT IS NO LONGER SHRINK WRAPPED IN PLASTIC!!! Shipping is a flat $15.00 in the continental U.S.