Best 31-Spline 12-Bolt Pinion Gears

1. 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

The Motive Gear F9.75-355 is a premium differential ring and pinion set designed for Ford 9.75″ axles. It’s perfect for daily driving or light towing needs.

This set features an 11-tooth pinion and 39-tooth ring gear with 31 splines. It’s made from 8620 steel for strength and quiet operation.

Built to OEM specs, it fits Ford F-150, Expedition, Transit, and Lincoln Navigator. Comes with a 1-Year or 50,000-Mile Warranty from Motive Gear.

2. Yukon Gear & Axle 3.73 ratio 31 spline pinion Ring and Pinion Set for 1993-1999 Ford 10.25″

Upgrade your Ford’s performance with the Yukon Gear & Axle Ring and Pinion Set. This 3.73 ratio set is designed for 1993-1999 Ford models with a 10.25″ axle. It’s a perfect fit for your vehicle.

The set includes a 31 spline pinion and a long pinion for smooth power transfer. It also comes with 12 ring gear bolts for secure installation.

Enhance your driving experience with this high-quality set. It’s easy to install and provides reliable performance. Get ready for a smoother ride.

3. Yukon Gear & Axle 4.56 ratio 31 spline pinion Ring and Pinion Set for 1993-1999 Ford 10.25″

Upgrade your Ford’s performance with the Yukon Gear & Axle 4.56 ratio Ring and Pinion Set. Designed for 1993-1999 models, this set ensures a perfect fit.

Key features include a 31 spline pinion, long pinion design, and 12 ring gear bolts. The 4.56 ratio enhances power and torque. Precision engineering guarantees durability.

Easy installation saves time and effort. Improved traction boosts off-road capability. Reliable performance meets all your driving needs.

4. 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 for lasting performance. Perfect for Ford F-150, Expedition, E-150, and Lincoln models from 1997-2009.

This gear set offers a 3.55 gear ratio for better torque and acceleration. It’s quiet, smooth, and easy to install, making it ideal for upgrades or replacements.

5. Motive Gear F9.75-456 Differential Ring & Pinion for Ford 9.75″ Rear, 4.56 Ratio, 8620 Steel, 12-Bolt, 31-Spline, Compatible with F-150, Expedition, Lincoln Navigator, E-Series & More (1997-2018)

The Motive Gear F9.75-456 is built for power and strength. It boosts acceleration, torque, and towing for Ford 9.75″ rear differentials. Perfect for off-road and heavy-duty use.

Made from premium 8620 steel, it resists wear and lasts long. Its precision design ensures a smooth, reliable fit.

Fits Ford and Lincoln models from 1997-2018. Comes with a 1-year/50,000-mile warranty. A trusted choice for high-performance upgrades.

6. Differential Ring and Pinion Gear Set 4.30 Ratio for Ford 9.75″ 12 Bolt Rear, 1.97″ Pinion Shaft, 31 Spline – Replaces For Nitro Gear F9.75-11-430-NG EXCEL F975430A (F9.75-430L)

Upgrade your Ford’s rear axle with this Differential Ring and Pinion Gear Set. It’s precision-machined for a perfect fit and quiet operation.

Made from durable 8620 steel, this set handles heavy loads with ease. It’s compatible with factory carriers and reduces noise for smoother drives.

1-Year Warranty, 50,000-mile coverage, reliable performance.

7. 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.

The master bearing kit includes premium bearings and seals. It ensures a smooth and reliable rear axle setup. Fits Ford 10.25″ differentials seamlessly.

This 12-bolt, 31-spline set is easy to install. It’s designed for standard rotation and heavy-duty use. Boost your truck’s power and efficiency today.

8. 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

The Motive Gear F10.5-373PK Ring & Pinion Set is a high-performance gear set for Ford 10.5″ differentials. It’s designed to boost torque and fuel efficiency, perfect for towing and highway driving.

Made from durable 8620 steel, this set offers superior strength and long-lasting durability. It’s built to handle heavy-duty use without wearing down quickly.

The 31-spline pinion ensures a smooth power transfer and accurate fitment. It’s compatible with multiple Ford models, making it a direct OEM replacement for easy installation.

9. EXCEL F10489L, Differential Ring & Pinion, For Ford 10.25, Gear Ratio: 4.89, 12-Bolt, 31 Spline, 8 Pinion & 39 Ring Tooth- Fits Ford F-250/F-350-1993-1998, Replaces:-USA Standard ZG F10.25-488L

The EXCEL F10489L is a differential ring and pinion designed for Ford 10.25 axles. It has a gear ratio of 4.89, 12 bolts, and 31 splines, fitting Ford F-250/F-350 models from 1993 to 1998.

This product is made in China and weighs 29.199 pounds. Its package measures 15.0″ L x 11.0″ W x 5.25″ H. It replaces USA Standard ZG F10.25-488L.

10. EXCEL F975410, Differential Ring & Pinion, For Ford 9.75″ (12 Bolt), Gear Ratio: 4.10, 12-Bolt, 31 Spline, 10 Pinion & 41 Ring Tooth – Fits 1997-2009 Ford F-150, Expedition, Lincoln Navigator

The EXCEL F975410 is a differential ring and pinion set. It fits Ford 9.75″ (12-bolt) differentials. This gear set is perfect for Ford F-150, Expedition, and Lincoln Navigator models from 1997 to 2009.

It has a 4.10 gear ratio with standard rotation. The set is made of durable 8620 steel for strength and heat resistance. It comes with a 1-year or 50,000-mile warranty.