Yukon Bearing & Seal Kit Dana 30A, Yukon Master Overhaul Kit for Dana Spicer 30 differential (3/8 and 7/16 ring gear bolts). This kit uses Timken Bearings and Races along with high quality seals and small parts. Included in this kit are carrier bearings and races, pinion bearings and races, pinion seal, complete shim kit, ring gear bolts, pinion nut, crush sleeve (if applicable), oil baffles and slingers (if applicable), Thread locking compound, marking compound with brush, and gasket. Yukon's Master Overhaul kits are the most comprehensive and complete kits on the market. They do extensive research to ensure that every kit is specially tailored to your application.