Precision DRK307MK Differential Rebuild Kit The Precision rebuild kits contain all the components needed for a complete rebuild of a light duty differential, kits are available in two levels of content -- Master Rebuild Kit and Standard Rebuild Kit Standard Rebuild Kits Contain: pinion head & tail bearings, pinion nose bearing (where applicable), differential bearings, pinion seal, pinion nut, crush sleeve or shims, RTV sealant, gear marking compound & brush to check gear tooth contact pattern Master Rebuild Kits Contain: Everything in a Standard Rebuilt Kit, plus ring gear bolts, pinion adjusting shims, and differential shims to adjust the ring & pinion back lash and set differential bearings pre-load Automotive and Light Truck Rebuild Kits Components are sample inspected at each process to insure all dimensional and visual specifications are met with 100% final inspection prior to packaging assuring the highest level of quality