11.25 inch Dana 80 4.30 Rear Ring and Pinion Install Kit 35 Spline Positraction 4.125 inch BRG Yukon Gear & AxleYukon Gear & Axle 11. 25 inch Dana 80, 4. 30 Ratio Rear Ring and Pinion Gear Set and Master Install Kit Package, with Dura 35 Spline Grip Limited Slip Positraction Details: Rear Differential 11. 25 inch Dana 80 Gear Ratio 4. 30 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 Cover and 12