Revolution F10.5-538-37 Ford 10.5in Rear 5.38 37 Spline Ring and Pinion Gear | 2011-2022 F250/F350

Features:

• Precision-engineered for Ford 10.5-inch differentials
• Optimized 5.38 gear ratio for maximum torque
• 37-spline design for added durability
• Designed for towing and off-road performance
• Enhances low-speed power and throttle response
• Improves drivability with oversized tires
• Made from high-grade 8620 steel
• Heat-treated for superior strength and longevity
• Provides better control in steep terrain
• Reduces strain on engine and transmission
• Preferred by installers for easy setup
• Backed by a 2-Year Manufacturer Warranty

Improves Towing and Off-Road Performance

When it comes to maximizing low-end power, re-gearing is one of the most important upgrades you can make. The Revolution Gear & Axle 5.38 Ring & Pinion Gear Set is built for the Ford 10.5-inch rear differential, found in 2011-2022 Ford F-250 and F-350 Super Duty trucks. Whether you’re running massive tires, pulling heavy trailers, or tackling technical off-road terrain, this gear set helps restore lost torque and keeps your truck in its optimal power band for better overall drivability. The 5.38 gear ratio is one of the most aggressive options available for a Super Duty, prioritizing low-speed torque and throttle response over highway efficiency. If you’ve upgraded to 37-inch tires or larger, factory gears can leave your truck feeling sluggish, forcing the transmission to work harder just to maintain speed. With 5.38 gears, your truck regains power where it matters most—helping with faster acceleration, stronger towing capability, and better control in steep or rocky terrain. Compared to lower numerical gears like 4.30s or 4.88s, the 5.38s deliver maximum torque but will also increase RPMs at highway speeds, making them better suited for trail rigs, heavy-haulers, and trucks that don’t see long highway commutes.

Heavy-Duty Construction

Made from 8620 high-grade steel, this ring and pinion set is precision-machined and heat-treated to handle extreme workloads, high-torque applications, and rugged off-road conditions. The 37-spline design adds additional strength, making it an excellent choice for high-horsepower trucks and heavy-duty towing setups. Each gear set is cut and finished with precision to ensure smooth, quiet operation, reducing the gear whine that is common with lower-quality aftermarket options. What's more, installation is a critical part of any ring and pinion upgrade, and Revolution Gear & Axle has built a reputation for making installer-friendly components that set up smoothly and consistently. This gear set is designed as a direct replacement for the Ford 10.5-inch differential, fitting seamlessly into place without requiring additional modifications. However, proper setup is essential to maximize performance and longevity, so professional installation is recommended.

Fits:

• 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 Ford F250 Super Duty
• 2011, 2012, 2013, 2014, 2015, 2016 Ford F350 Super Duty

Specifications:

• Gear Rotation: Standard
• Pinion Splines: 37
• Ring Gear Diameter: 10.5 Inch
• Ring Gear Bolt Thread: 12 x 12MM
• Carrier Break: No Carrier Break
• Cover Bolts: 12 Bolt
• Differential: Ford 10.5 Inch
• Material: 8620