Dana specializes in off road products drivers need. The Dana 44 rear master overhaul kit is designed to help make repairs that last. Drivers can benefit from durable bearings, cones and cups to top grade oil seals. These are all ways to prevent leaks and contaminants.Included are the bearings (tail and differential) and pinions (head, nut and seal). The spacer (collapsible version) is also included, as are the RTV sealant, the shims (differential adjusting and pinion adjusting versions) and the bolts (ring gear).