Yukon Gear & Axle YG F10.5-373-31 Ring & Pinion Gear Set Ford 10.5" 3.73 Ratio 31-Spline

The Yukon Gear & Axle YG F10.5-373-31 is a high-performance ring and pinion gear set engineered for the Ford 10.5" differential in a 3.73 ratio. Designed for 1999–2010 Ford applications, this gear set delivers the strength and precision needed for street driving, off-road adventures, and track use alike.

Yukon engineers leverage state-of-the-art design processes and advanced heat-treating techniques, backed by two in-house quality labs, to ensure every gear set meets exacting dimensional and metallurgical standards. The specially engineered gear tooth surface finish minimizes friction and heat buildup, making these gears well-suited for high-torque conditions and extended hard use.

Key Specifications:

• Ring Gear Diameter: 10.50 inches
• Gear Ratio: 3.73:1
• Pinion Spline Count: 31 splines
• Ring Gear Teeth: 41
• Pinion Gear Teeth: 11
• Ring Gear Bolts: 12
• Gear Rotation: Standard
• Application: Ford 10.5" Differential, 1999–2010

Key Features:

• High-grade steel construction in both ring and pinion for superior strength and durability
• Fitment engineered to OEM specifications for straightforward installation
• Optimized tooth surface finish reduces friction and heat for long-term reliability under high-torque loads
• Quiet-running design suitable for daily driving and performance applications
• Sold as a complete set — ring gear and pinion included
• Backed by a 1-year warranty against manufacturing defects
• Eligible for the optional Yukon Y.E.S. Plan — lifetime, no-questions-asked coverage for as long as you own the vehicle

Yukon Gear & Axle is the official gear and axle brand of the Ultra4 Racing Series and King of the Hammers, with gear sets proven in some of the most demanding off-road environments in the world. Whether you're regearing for larger tires, optimizing towing performance, or building a high-horsepower platform, the YG F10.5-373-31 delivers the quality and confidence Yukon is known for.