8.5" GM Ring and Pinion Kit w/ 3.73 Ratio & 30-Spline Limited Slip

The USA Standard Gear ZGK2002 is a comprehensive re-gear and traction kit designed to enhance the performance of your differential. The Yukon Dura Grip is engineered for smooth yet aggressive traction, offering durability with its high-strength nodular case, forged 4320 chromoly spider gears, and composite clutches. It is also fully rebuildable. This kit is specifically designed for GM 8.5" differentials with a 10-bolt rear cover and 10-bolt ring gear. The included ring and pinion set provides a 3.73 gear ratio, which can significantly improve performance for various driving conditions, from daily commuting to trail running. The kit comes complete with axle bearings and seals, offering a one-stop solution for differential upgrades and repairs. USA Standard Gear prioritizes quality with rigorous in-house testing for dimensional accuracy, material integrity, and proper fitment. This ZGK2002 kit is ideal for those looking to increase traction and upgrade their gear ratio simultaneously. The differential carrier bearings feature a 2.891" outside diameter.