Yukon 8.6in GM 4.56 Rear Ring & Pinion Install Kit 30 Spline Kit contains a ring and pinion set, positraction unit, and installation ZF 9.25 inch CHY 3.21 Rear Ring and Pinion Install Kit Positraction Bearings and Seals Yukon Gear & Axle Yukon 10.5in Ford 4.11 Rear Ring & Pinion Install Kit 35 Spline Kit contains a ring and pinion set, positraction unit, and installation. Yukon Gear & Axle ZF 9. 25 inch CHRYSLER, 3. 21 Ratio Rear Ring and Pinion Gear Set and Master Install Kit Package, with 31 Spline Yukon Dura Grip Limited Slip Positraction, and Axle Bearings and Seals Details: Rear Differential ZF 9. 25 inch CHY Gear Ratio 3. 21 Location Rear Structured Ring and Pinion Install Kit Positraction Yes Axle Bearings and Seals Yes Warranty Warrantied against manufacturing defects for one (1) year Sold As Kit Features: This particular kit contains a 3. 21 Ring and Pinion Gear Set For Applications with 12 Bolt Rear Cover and 12 Bolt Ring Gear Pro Kits feature the highest quality components and are backed by the best warranty in the business. Pro Kits include premium Yukon ring and pinion sets, Yukon Master Install kits with high quality Timken bearings and the necessary small parts required to get vehicles off the lift and back on the road quickly. The Gear and Install Kit Includes Axle Bearings and Seals The Gear and Install Kit Includes Yukon Dura Grip Clutch Style Limited Slip (LSD); All positraction units are fully rebuildable. The Ring Gear Diameter is 9. 25 inch Yukon Pro Kits offer premium differential repair and performance parts in several convenient packages to save time and money by including everything you need in one simple part number.