Best 31-Spline 12-Bolt Gear Sets

1. Motive Gear F10.5-373PK Ring & Pinion Set, 31 Spline for Ford 10.5″ -Fit for 12-Bolt Ford 10.5 Differential –3.73 Ratio, Compatible for 1999-2007 Ford F-250, F-350, Excursion –Replaces YG F10.5-373-31

Upgrade your Ford’s performance with the Motive Gear F10.5-373PK Ring & Pinion Set. Designed for 10.5″ differentials, it delivers optimal torque and fuel efficiency. Perfect for towing and highway driving.

Made from durable 8620 steel, this set ensures long-lasting strength and smooth power transfer. It fits 1999-2007 Ford trucks and Excursions, replacing OEM parts seamlessly.

2. National Drivetrain 3.73 Ring and Pinion Gear Set & Motive Gear Master Bearing Kit for Ford 10.25″ Differential | 1985-1998 F-250 F-350 E-Series | 8620 Steel | 12-Bolt | 31 Spline | R10.25RMK

Upgrade your Ford’s performance with this 3.73 Ring and Pinion Gear Set. It’s made from durable 8620 steel for long-lasting use. Perfect for 1985-1998 F-250, F-350, and E-Series models.

This kit includes a master bearing set with premium bearings and seals. It fits Ford 10.25″ rear differentials seamlessly. Ideal for trucks needing a reliable upgrade.

Install with confidence using the 12-bolt, 31-spline design. The standard rotation ensures smooth operation. Enhance your truck’s power and efficiency today.

3. Motive Gear F9.75-355 Differential Ring & Pinion For Ford 9.75″ Ratio 3.55, 12-Bolt 31 Spline 11 Pinion & 39 Ring Tooth Fits Ford F-150 Expedition Lincoln Navigator Replaces 3L1Z4209CB, YG F9.75-355

Upgrade your Ford 9.75″ axle with the Motive Gear F9.75-355 Differential Ring & Pinion. This 3.55 ratio set is perfect for daily driving or light towing. It fits Ford F-150, Expedition, and Lincoln Navigator models.

Built with 8620 steel, it ensures strength and quiet operation. Enjoy a 1-Year or 50,000-Mile Warranty from Motive Gear, a trusted drivetrain performance brand.

4. Richmond Gear 12BT342 Excel Ring/Pinion Gear Set (12 Bolt Truck/3.42)

The Richmond Gear 12BT342 is a top-quality gear set designed for heavy-duty trucks. It features a 12-bolt design and a 3.42 ratio, perfect for reliable performance.

This Excel Ring and Pinion Gear Set is built to last long and handle tough conditions. It ensures smooth power delivery and efficient operation for your vehicle.

Easy to install, durable, and high-performance. A great choice for truck upgrades.

5. EXCEL F975430, Differential Ring & Pinion, For Ford 9.75, Gear Ratio 4.30, 12-Bolt, 31 Spline, 10 Pinion & 43 Ring Tooth –Fits Ford F-150/Expedition/Navigator 1997-2009 Replaces Motive Gear F9.75-430

The EXCEL F975430 Differential Ring & Pinion is designed for Ford 9.75″ differentials. It fits Ford F-150, Expedition, and Navigator models from 1997-2009.

Made from durable 8620 steel, it handles tough tasks like towing and off-roading. Its 4.30 gear ratio boosts torque and power transfer.

This complete set includes a 1-Year / 50,000-Mile Warranty. Professional installation ensures top performance and reliability.

6. Yukon Gear & Axle 4.56 ratio 31 spline pinion Ring and Pinion Set for 2011 and up Ford 9.75″

This Yukon Gear & Axle set fits 2011 and up Ford 9.75″ axles. It has a 4.56 gear ratio for strong performance. The 12 bolt design adds durability.

The 31 spline pinion ensures toughness under stress. Built to last in tough driving conditions.

7. Yukon Gear & Axle 3.73 Ratio 31 Spline Pinion Ring and Pinion Set for 1999-2010 Ford 10.5″

Upgrade your Ford’s performance with the Yukon Gear & Axle 3.73 Ratio 31 Spline Pinion Ring and Pinion Set. This high-quality set is designed to fit 1999-2010 Ford 10.5″ vehicles, ensuring a perfect match. It features a 10.50″ ring gear diameter and a 31 spline pinion, providing optimal power transfer.

The set includes 12 ring gear bolts, making installation quick and easy. With a 3.73 ratio, this set delivers improved acceleration and enhanced towing capabilities. It’s an ideal choice for those seeking reliable and durable performance upgrades.

This Yukon Gear & Axle set is built to last, offering long-lasting performance and peace of mind. Easy to install and compatible with your Ford, it’s a smart investment for any vehicle owner.

8. EXCEL F975355, Differential Ring & Pinion, For Ford 9.75″, Gear Ratio: 3.55, 12-Bolt, 31 Spline, 11 Pinion & 39 Ring Tooth –Fits Ford F-150/Expedition/E-150/Lincoln – 1997-2009, Replaces: SVL 2020861

The EXCEL F975355 Differential Ring & Pinion is built tough for Ford 9.75″ differentials. It’s made from high-strength 8620 steel, ensuring durability and reliability. Perfect for heavy-duty use and high torque demands.

This gear set fits Ford F-150, Expedition, E-150, and Lincoln models from 1997-2009. Its 3.55 gear ratio boosts torque and acceleration, ideal for towing and off-road adventures. The 12-bolt design ensures seamless compatibility.

Enjoy a smoother, quieter ride with advanced machining. This versatile upgrade is easy to install and built to last. Package dimensions: 38.6 H x 14.0 L x 18.5 W cm.

9. Yukon Gear & Axle 3.73 ratio 31 spline pinion Ring and Pinion Set for 2011 and up Ford 9.75″

Upgrade your Ford 9.75″ axle with the Yukon Gear & Axle 3.73 ratio set. This 31 spline pinion and ring gear fit 2011 and up models. It includes 12 ring gear bolts for a secure installation.

The 3.73 ratio improves performance and efficiency. It’s designed for durability and smooth operation.

10. Yukon Gear & Axle 3.08 ratio 30 spline pinion Ring and Pinion Set for GM 12 bolt truck

The Yukon Gear & Axle 3.08 ratio 30 spline pinion Ring and Pinion Set is designed for GM 12 bolt trucks. It offers a smooth and efficient performance for your vehicle.

This set features an 8.875″ ring gear diameter, a 30 spline pinion, and 12 ring gear bolts. It has a 3.08 ratio, perfect for balanced power and speed.

Upgrade your truck with this reliable and durable set. It ensures optimal performance and long-lasting use.