This is a genuine AAM pinion yoke wear sleeve for the 1998 and newer GM trucks with the 8.6 or 9.5 rear differential. Also used on the 2003 and newer Dodge Ram 2500 and 3500 series 4X4 trucks with the 9.25 front differential. Used with either the 26064028 or 26064029 pinion seal. Shipping is FAST and FREE in the continental U.S.