Ring & Pinion Set For Dana 80 In A 3.73 , Thin For 4.10 & Up Case USA Standard GearUSA Standard ring and pinion sets are the right choice to add confidence to your install. USA Standard Gear offers a full line of ring and pinion sets for a variety of common and hard to find applications. Fits Dana Spicer 80 11. 25 Inch Ring Gear Diameter 37 Spline Pinion 12 ring gear bolts 3. 73 ratio Thin gear set for 4. 10 and up carrier 1 year warranty against Manufacturer defects Features and Benefits: Fits Dana Spicer 80 11. 25 Inch ring gear