Yukon Minimum installation kits are a low cost solution for gear changes in newer vehicles where the bearings can be reused and includes all high quality components for a smooth set up.Details: Fits 8.5 inch Oldsmobile with 31 spline axles Included are a pinion seal, crush sleeve, complete shim kit, marking compound and brush 1 Year Warranty Against Manufacturer Defects Sold As A Kit Fits Vehicles: Oldsmobile 442 (1968 - 1968) Pontiac Catalina (1965 - 1981) Pontiac GTO (1965 - 1971) Pontiac LeMans (1968 - 1968)