11.25 inch Dana 80 Thin 3.73 Rear Ring and Pinion Install Kit 35 Spline Positraction 4.375 inch Yukon Gear & AxleYukon Gear & Axle 11. 25 inch Dana 80, Thin 3. 73 Ratio Rear Ring and Pinion Gear Set and Master Install Kit Package, with 35 Spline Yukon Dura Grip Limited Slip Positraction Details: Rear Differential 11. 25 inch Dana 80 Gear Ratio 3. 73 Thin Location Rear Structured Ring and Pinion Install Kit Spline 35 Spline Positraction Yes Warranty Warrantied against manufacturing defects for one (1) year Sold As Kit Features: For Applications with 10 Bolt Rear