Yukon Gear & Axle YGK2139 10.5" Ford 3.73 Rear Ring & Pinion Kit with 35-Spline Dura Grip Posi

The Yukon Gear & Axle YGK2139 is an all-inclusive Pro Kit combining a 3.73 ratio rear ring and pinion gear set, a Master Install Kit, and a 35-spline Dura Grip clutch-style limited slip differential (LSD) — everything needed to fully re-gear a Ford 10.5" rear differential in a single part number.

Yukon Pro Kits are engineered for professional installers and serious builders who demand quality and efficiency. The kit bundles premium Yukon ring and pinion gears with a complete Yukon Master Install Kit featuring high-quality Timken bearings and all necessary small parts, so the job can be completed without hunting down individual components.

Kit Specifications:

• Ring Gear Diameter: 10.5"
• Gear Ratio: 3.73
• Pinion Spline Count: 35
• Application: 12-bolt rear cover and 12-bolt ring gear
• Inner Pinion Bearing & Race: NP 504493 / NP 949481

What's Included:

• Yukon 3.73 ring and pinion gear set for Ford 10.5" differential
• Yukon Master Install Kit with Timken bearings and all required small parts
• Yukon Dura Grip clutch-style limited slip positraction unit (35-spline)

About the Yukon Dura Grip LSD:

The Dura Grip is a clutch-pack-style limited slip unit that continuously distributes torque to both wheels under normal driving conditions. When wheel slip is detected, the clutch packs engage to transfer more torque to the tire with the best traction, improving grip and control. Unlike gear-type units, the Dura Grip is fully rebuildable — clutch packs can be replaced to restore original performance or customized for specific driving styles.

Yukon ring and pinion gear sets are manufactured using advanced heat-treating techniques and state-of-the-art processes to meet exacting surface finish and structural specifications. Gears are designed to run cooler and quieter than competing aftermarket sets. This Pro Kit is backed by Yukon's Y.E.S. Plan — a lifetime warranty covering the gear set kit for as long as you own the vehicle.