Yukon Gear & Axle YGK2221 GM 12-Bolt Truck 4.11 Ratio Ring & Pinion Kit with 30-Spline Dura Grip Posi

The Yukon Gear & Axle YGK2221 is an all-inclusive re-gear package for the GM 8.875" 12-Bolt Truck rear differential, delivering everything needed to complete a full differential rebuild in a single part number. This Pro Kit bundles a 4.11 ratio ring and pinion gear set, a Yukon Master Install Kit with premium Timken bearings, a 30-spline Yukon Dura Grip clutch-style limited slip positraction, and application-specific axle bearings and seals.

Kit Contents & Key Specifications:

• Ring Gear Diameter: 8.875" — fits GM 12-Bolt Truck rear differential
• Gear Ratio: 4.11 ring and pinion set
• Positraction: 30-spline Yukon Dura Grip clutch-style limited slip (LSD) — fully rebuildable
• Bearings: High-quality Timken bearings included in the Master Install Kit
• Axle Bearings & Seals: Application-specific units included
• All necessary small parts (shims, crush sleeve, pinion nut, marking compound, and RTV) included

About Yukon Dura Grip:

The Yukon Dura Grip is a clutch-style limited slip differential that provides improved traction over open differentials in street, towing, and off-road conditions. All Yukon Dura Grip positraction units are fully rebuildable, extending service life and protecting your investment.

About Yukon Pro Kits:

Yukon Pro Kits are engineered using state-of-the-art design, advanced heat-treating techniques, and rigorous quality testing to meet exacting specifications. By combining the ring and pinion gear set, Master Overhaul Kit, positraction unit, and axle bearings and seals into one convenient package, these kits eliminate the guesswork of sourcing individual components and get your vehicle back on the road faster.

Yukon Gear & Axle backs its gear sets with the Y.E.S. Plan (Yukon Extended Service Plan) — a lifetime, no-questions-asked replacement warranty valid for as long as you own the vehicle.