Front Ring and Pinion Gear Set (ZGT7.5R-456R) by USA Standard Gear. Ratio: 4.56. 10 ring gear bolts. USA 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. USA standard gear offers a standard one year warranty against defects on their ring and pinion sets.