Yukon Gear & Axle YGK144 GM 8.5in 4.56 Ratio Ring & Pinion with Master Install Kit and Dura Grip Posi 30-Spline

The Yukon Gear & Axle YGK144 is a comprehensive drivetrain upgrade package for the GM 8.5-inch 10-bolt rear axle, bundling a 4.56 ratio ring and pinion gear set, a master install kit, and a Yukon Dura Grip limited slip positraction unit into one convenient package. This eliminates the guesswork of sourcing individual components and ensures full compatibility across every included part.

The 4.56 ring and pinion gears are precision-machined to Yukon's exacting standards for quiet operation, long service life, and consistent mesh geometry. Whether you're regearing for improved low-end torque, larger tires, or off-road performance, the 4.56 ratio delivers a significant improvement in acceleration and pulling power.

The included Yukon Dura Grip positraction is a clutch-pack-style limited slip differential designed as a direct OEM replacement. It provides improved traction on slippery or uneven terrain by distributing torque to both rear wheels, and is compatible with 30-spline axle shafts.

Package Includes:

• 4.56 ratio ring and pinion gear set for GM 8.5-inch rear axle
• Yukon Dura Grip limited slip positraction unit (30-spline)
• Master differential install kit with carrier bearings and races
• Pinion bearings and races
• Pinion seal
• Axle bearings and seals
• Ring gear bolts
• Marking compound and brush

Key Features:

• Application: GM 8.5-inch 10-bolt rear axle
• Gear Ratio: 4.56
• Positraction Type: Dura Grip clutch-pack limited slip
• Spline Count: 30-spline axle compatibility
• Everything-in-one package for a complete differential rebuild and regear
• Gear sets manufactured to OEM or better tolerances for precise fitment

The Yukon YGK144 package is ideal for a single-order solution for anyone performing a full rear differential rebuild with a gear ratio change on a compatible GM 8.5-inch axle platform.