Yukon Gear & Axle YGK2228 GM 8.875" 12-Bolt 3.73 Thick Rear Ring & Pinion Kit with Dura Grip Posi & Axle Bearings

The Yukon Gear & Axle YGK2228 is a comprehensive rear differential re-gear package for the GM 8.875" 12-Bolt truck axle. This all-in-one Pro Kit bundles a 3.73 ratio Thick Ring & Pinion gear set, a Yukon Master Install Kit, a 26-spline Yukon Dura Grip Limited Slip Positraction, and 2.25" OD axle bearings and seals under a single part number—giving you everything needed to complete a full differential rebuild without hunting down individual components.

The 3.73 Thick ring and pinion is designed for carrier cases built for 2.76–3.42 gear ratios and is specifically engineered for axles using a 12-bolt rear cover and 12-bolt ring gear. Yukon engineers design these gear sets using state-of-the-art manufacturing methods and advanced heat-treating techniques to ensure precise surface finish and structural integrity under demanding loads.

The included Yukon Dura Grip is a clutch-style limited slip differential (LSD) positraction unit built with a high-strength nodular iron case, forged 4320 chromoly spider gears, and composite clutches for smooth yet aggressive traction delivery. The Dura Grip is fully rebuildable and proudly assembled in the USA.

Kit Includes:

• 3.73 Ratio Thick Ring & Pinion Gear Set — GM 8.875" 12-Bolt Truck
• Yukon Master Install Kit with high-quality Timken bearings and all required small parts
• 26-Spline Yukon Dura Grip Clutch-Style Limited Slip Positraction (fully rebuildable)
• 2.25" OD Axle Bearings and Seals

Key Specifications:

• Ring Gear Diameter: 8.875"
• Gear Ratio: 3.73:1 (Thick gear set)
• Ring Gear Bolts: 12
• Cover Bolts: 12
• Carrier Case Compatibility: Designed for 2.76–3.42 gear ratio carrier cases
• Positraction Spline Count: 26-spline
• Axle Bearing OD: 2.25"

Yukon Pro Kits are engineered to streamline the re-gear process, reducing lift time by combining premium gear sets, master overhaul hardware, positraction, and axle bearings into one convenient package. This kit is eligible for Yukon's Y.E.S. Plan—a lifetime, no-questions-asked protection plan valid for as long as you own the vehicle.