Ring & Pinion Set For GM 7.5 Inch In A 4.56 Ratio 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 GM 7. 5 inch and 7. 6 inch 7. 50 Inch Ring Gear Diameter 27 Spline Pinion 10 ring gear bolts 4. 56 ratio 1 year warranty against Manufacturer defects Features and Benefits: Fits GM 7. 5 Inch and 7. 6 Inch 7. 50 Inch ring gear diameter 27 spline