Looking for the best 31-spline 12-bolt gears to boost your vehicle’s performance? Discover expert-recommended options from trusted brands like Motive Gear and USA Standard, offering unmatched durability, strength, and smooth driving experiences tailored to your ride.
Upgrading your vehicle’s performance starts with the right gears. Whether you’re towing heavy loads or seeking smoother rides, 31-spline 12-bolt gears are a game-changer. This guide highlights the best options to boost your vehicle’s power and reliability.
These gears fit popular models like Ford F-150, Expedition, and more. They’re made from tough 8620 steel for lasting strength.
Discover top brands like Motive Gear, USA Standard, and Excel. Each offers durable, easy-to-install solutions to transform your ride. Let’s dive in!
List of Top 10 31-Spline 12-Bolt Gears
| Image | Title | Best For | Price |
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USA Standard Gear SL GM12-30 GM 12 Bolt differential-30 Spline axles Spartan Locker |
This product is perfect for car and truck owners who want a strong, reliable upgrade for their GM 12 Bolt axle. It is ideal for those who want an easy, drop-in installation without hassle. If you need durable parts made from tough 9310 steel with precision-cut teeth, this is a great choice. It fits perfectly on 30 spline axles and is backed by a 1-year warranty for peace of mind. |
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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) |
This product is perfect for Ford truck or SUV owners needing a 4.30 gear ratio upgrade for 9.75″ 12-Bolt rear axles. It’s built for durable performance, quiet operation, and easy factory fit, backed by a 1-year warranty. |
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Motive Gear F9.75-456L, Differential Ring & Pinion, For Ford 9.75, Gear Ratio 4.56, 12-Bolt, 31 Spline, 9 Pinion & 41 Ring Tooth Fits Ford F-150, Expedition, Transit, Lincoln Replaces YG F9.75-456-11 |
This product is perfect for Ford and Lincoln drivers needing gear ratio upgrades or drivetrain replacements for their 2011–2024 F-150, Expedition, Transit, or Lincoln Navigator. Built with durable 8620 steel and a 4.56 gear ratio, it’s ideal for towing builds or heavy-duty use, backed by a 1-Year / 50,000-Mile Warranty. |
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Motive Gear F10.25-4.10L Differential Ring & Pinion, For Ford 10.25″, Gear Ratio 4.10, 12-Bolt, 31 Spline, 10 Pinion & 41 Ring Tooth Fits Ford F-Series, Econoline, Lobo & Chassis, Rep. YG F10.25-411L |
This product is perfect for Ford truck owners needing heavy-duty performance. It suits those towing, hauling, or upgrading Ford 10.25″ axles with a 4.10 gear ratio for stronger low-end power. |
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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 |
Ford truck owners needing a durable gear upgrade for 1999-2007 F-250, F-350, Excursion, or F-150 models. Perfect for heavy-duty towing, highway driving, or replacing worn gears with a strong 8620 steel set that fits like factory parts. |
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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 |
This differential gear set is perfect for Ford truck owners needing a strong, quiet 3.55 gear ratio for daily driving or light towing. It fits Ford 9.75″ 12-bolt axles with 31-spline pinion and 8620 steel for long life. |
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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 |
This gear set is perfect for Ford truck owners with 1985-1998 F-250, F-350, or E-Series models needing a 3.73 gear ratio upgrade. It includes a durable 8620 steel ring and pinion and a complete bearing kit for smooth, reliable performance. |
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Motive Gear F9.75-489 Differential Ring & Pinion, For Ford 9.75″, Ratio 4.89, 12-Bolt, 31 Spline, 8 Pinion & 39 Ring Tooth Fits Ford F-150, Expedition, E-Series, Transit, Lincoln, Yukon YG F9.75-488. |
This Motive Gear F9.75-489 Differential Ring & Pinion is perfect for Ford and Lincoln owners who need a reliable, high-performance replacement for their 9.75″ differential. It’s ideal for trucks and SUVs facing heavy loads or needing better performance. |
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Motive Gear F9.75-410L Differential Ring & Pinion For Ford 9.75″ Gear Ratio: 4.10, 12-Bolt 31 Spline 10 Pinion & 41 Ring Tooth – Fits Ford F-150 Replaces Ford BL3Z-4209-A, Yukon YG F9.75-411-11 |
This product is perfect for Ford truck owners needing a strong gear set for towing or off-road use. It offers a 4.10 ratio, heat-treated steel for long life, and fits 9.75″ differentials with a 12-bolt cover. |
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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 |
This differential ring and pinion is perfect for Ford owners who want to upgrade their vehicle’s performance. It’s ideal for towing, off-road adventures, or daily driving, offering stronger torque and smoother operation. |
Detailed Reviews
Discover the top 10 31-Spline 12-Bolt Gears in this expert-curated guide. Each product is thoroughly reviewed for performance, durability, and value. Whether you need strength, smooth operation, or affordability, this guide has you covered. Find the perfect upgrade for your vehicle and drive with confidence.
1. USA Standard Gear SL GM12-30 GM 12 Bolt differential-30 Spline axles Spartan Locker
Upgrade your ride with the USA Standard Gear SL GM12-30 Spartan Locker. It fits perfectly in GM 12 Bolt Passenger Cars or Trucks with 30 Spline Axles. Installation is easy and requires no hassle.
This locker is made from tough 9310 steel. It has heat treated and precision cut teeth for durability and strength.
Enjoy peace of mind with a 1-year warranty. Get stronger, smoother performance now. Make your vehicle unstoppable.
| Pros | Cons |
|---|---|
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Perfect For:
This product is perfect for car and truck owners who want a strong, reliable upgrade for their GM 12 Bolt axle. It is ideal for those who want an easy, drop-in installation without hassle. If you need durable parts made from tough 9310 steel with precision-cut teeth, this is a great choice. It fits perfectly on 30 spline axles and is backed by a 1-year warranty for peace of mind.
Ready to Purchase?
2. 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 9.75″ 12-Bolt rear axle with this Differential Ring and Pinion Gear Set. It fits perfectly and runs quietly. Made from strong 8620 steel, it lasts long even under tough use.
This gear set matches and replaces popular brands like Nitro Gear and EXCEL. It comes with a 1-year warranty for peace of mind.
| Pros | Cons |
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Perfect For:
This product is perfect for Ford truck or SUV owners needing a 4.30 gear ratio upgrade for 9.75″ 12-Bolt rear axles. It’s built for durable performance, quiet operation, and easy factory fit, backed by a 1-year warranty.
Ready to Purchase?
3. Motive Gear F9.75-456L, Differential Ring & Pinion, For Ford 9.75, Gear Ratio 4.56, 12-Bolt, 31 Spline, 9 Pinion & 41 Ring Tooth Fits Ford F-150, Expedition, Transit, Lincoln Replaces YG F9.75-456-11
Motive Gear F9.75-456L is built for Ford 9.75″ rear axles with a 4.56 gear ratio. It features 9 pinion teeth, 41 ring teeth, and a 31 spline pinion for strong performance.
Made from durable 8620 steel, this gear set ensures smooth operation under heavy loads. It fits Ford and Lincoln models from 2011–2024, including F-150, Expedition, and Transit. A 1-Year / 50,000-Mile Warranty adds peace of mind.
This set includes ring and pinion gears for easy upgrades. Perfect for towing builds or replacing worn drivetrain parts. The 12-bolt design ensures secure installation.
| Pros | Cons |
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Perfect For:
This product is perfect for Ford and Lincoln drivers needing gear ratio upgrades or drivetrain replacements for their 2011–2024 F-150, Expedition, Transit, or Lincoln Navigator. Built with durable 8620 steel and a 4.56 gear ratio, it’s ideal for towing builds or heavy-duty use, backed by a 1-Year / 50,000-Mile Warranty.
Ready to Purchase?
4. Motive Gear F10.25-4.10L Differential Ring & Pinion, For Ford 10.25″, Gear Ratio 4.10, 12-Bolt, 31 Spline, 10 Pinion & 41 Ring Tooth Fits Ford F-Series, Econoline, Lobo & Chassis, Rep. YG F10.25-411L
Motive Gear F10.25-4.10L is a durable differential ring and pinion set for Ford trucks. It boosts towing power with a 4.10 gear ratio.
Built with 8620 heat-treated steel, it handles high torque. The set fits Ford 10.25″ axles with 12-bolt and 31 spline. It includes 10-tooth pinion and 41-tooth ring gear.
This gear works for F-Series, Econoline, Super Duty, Lobo, and chassis from 1985–2011. It ensures strong low-end power and reliability. Backed by a 1-year or 50,000-mile warranty, it’s a trusted upgrade.
| Pros | Cons |
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Perfect For:
This product is perfect for Ford truck owners needing heavy-duty performance. It suits those towing, hauling, or upgrading Ford 10.25″ axles with a 4.10 gear ratio for stronger low-end power.
Ready to Purchase?
5. 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 upgrades Ford 10.5″ differentials with a 3.73 gear ratio. It boosts towing power and highway fuel efficiency for trucks under heavy use. Built for 12-bolt Ford 10.5 diffs, it ensures smooth performance.
Made from 8620 steel, this set resists wear and handles tough conditions. The 31-spline pinion and 12-bolt ring gear provide precise fit and reliable power transfer. It’s ideal for F-250, F-350, Excursion, and other compatible Ford models.
This gear set directly replaces OEM parts like Yukon YG F10.5-373-31. It’s a simple swap for factory-level durability and function.
| Pros | Cons |
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Perfect For:
Ford truck owners needing a durable gear upgrade for 1999-2007 F-250, F-350, Excursion, or F-150 models. Perfect for heavy-duty towing, highway driving, or replacing worn gears with a strong 8620 steel set that fits like factory parts.
Ready to Purchase?
6. 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
This Motive Gear F9.75-355 Differential Ring & Pinion upgrades Ford 9.75″ 12-bolt axles with a 3.55 gear ratio. It’s perfect for daily driving or light towing in trucks like the F-150, Expedition, and Lincoln Navigator.
The set includes an 11-tooth pinion and 39-tooth ring gear. Its 31-spline pinion and 8620 steel boost strength and reduce noise. This design ensures smooth, durable performance for rear differentials.
It fits OE specs for easy replacement. Backed by a 1-year or 50,000-mile warranty, it’s reliable. Compatible with Ford, Yukon, Dorman, and other brands’ part numbers.
| Pros | Cons |
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Perfect For:
This differential gear set is perfect for Ford truck owners needing a strong, quiet 3.55 gear ratio for daily driving or light towing. It fits Ford 9.75″ 12-bolt axles with 31-spline pinion and 8620 steel for long life.
Ready to Purchase?
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
The National Drivetrain 3.73 Ring and Pinion Gear Set is a durable upgrade for your Ford truck or van. It’s made from strong 8620 steel and fits 1985-1998 F-250, F-350, and E-Series models. This set works with the 10.25-inch rear differential.
This kit includes a master bearing kit with premium bearings and seals. It has 31 splines and a 12-bolt design. The gear ratio is 3.73, perfect for improved performance.
The Motive Gear Master Bearing Kit ensures a smooth and reliable installation. It’s easy to install and built to last long. Upgrade your vehicle with confidence today.
| Pros | Cons |
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Perfect For:
This gear set is perfect for Ford truck owners with 1985-1998 F-250, F-350, or E-Series models needing a 3.73 gear ratio upgrade. It includes a durable 8620 steel ring and pinion and a complete bearing kit for smooth, reliable performance.
Ready to Purchase?
8. Motive Gear F9.75-489 Differential Ring & Pinion, For Ford 9.75″, Ratio 4.89, 12-Bolt, 31 Spline, 8 Pinion & 39 Ring Tooth Fits Ford F-150, Expedition, E-Series, Transit, Lincoln, Yukon YG F9.75-488.
Upgrade your Ford’s performance with the Motive Gear F9.75-489 Differential Ring & Pinion. It has a 4.89 ratio and fits Ford’s 9.75″ differentials. Made from strong 8620 steel, it lasts long and runs quietly.
This set fits many Ford and Lincoln models from 1997 to 2018. It comes with a 1-Year / 50,000-Mile Warranty for peace of mind.
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Perfect For:
This Motive Gear F9.75-489 Differential Ring & Pinion is perfect for Ford and Lincoln owners who need a reliable, high-performance replacement for their 9.75″ differential. It’s ideal for trucks and SUVs facing heavy loads or needing better performance.
Ready to Purchase?
9. Motive Gear F9.75-410L Differential Ring & Pinion For Ford 9.75″ Gear Ratio: 4.10, 12-Bolt 31 Spline 10 Pinion & 41 Ring Tooth – Fits Ford F-150 Replaces Ford BL3Z-4209-A, Yukon YG F9.75-411-11
Motive Gear 4.10 ring and pinion fits Ford 9.75″ rear differentials. It has 41 ring teeth and 10 pinion teeth. This gear set is built for performance or OE replacement.
Heat-treated 8620 steel ensures strength and quiet operation. It handles towing, street driving, and heavy-duty use reliably.
Covered by a 1-Year / 50,000-Mile Warranty, this set meets safety standards. It includes only the ring and pinion gears.
| Pros | Cons |
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Perfect For:
This product is perfect for Ford truck owners needing a strong gear set for towing or off-road use. It offers a 4.10 ratio, heat-treated steel for long life, and fits 9.75″ differentials with a 12-bolt cover.
Ready to Purchase?
10. 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
This is a Ford 9.75″ differential gear set. It has a 3.55 gear ratio for better torque and speed. It fits Ford trucks and vans from 1997 to 2009.
Made from strong 8620 steel, it handles heavy use and high power. The 12-bolt, 31-spline design ensures a secure fit.
Works quietly and smoothly thanks to precise engineering. It replaces SVL 2020861 and fits Ford F-150, Expedition, and similar models.
| Pros | Cons |
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Perfect For:
This differential ring and pinion is perfect for Ford owners who want to upgrade their vehicle’s performance. It’s ideal for towing, off-road adventures, or daily driving, offering stronger torque and smoother operation.
Ready to Purchase?
Buying Guide
Upgrading your vehicle’s gears is simple. It makes your ride stronger and smoother. You’ll feel the power right away.
Here’s what to think about when buying 31-spline 12-bolt gears:
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Fitment: Make sure the gears match your vehicle’s axle size and model. For example, Ford 9.75″ or 10.25″ axles need specific gear sets. Check spline count and bolt pattern carefully.
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Material Quality: Look for gears made from tough steel like 8620 or 9310. These materials last longer and handle heavy loads without breaking.
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Gear Ratio: Choose a gear ratio that fits your driving needs. Lower ratios like 3.55 or 3.73 are good for daily driving and fuel economy. Higher ratios like 4.56 or 4.89 boost towing power and acceleration.
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Brand Reputation: Pick trusted brands like Motive Gear, USA Standard, or Excel. They offer durable gears with precise cuts and heat treatment for strength.
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Warranty: A solid warranty (usually 1 year or 50,000 miles) shows the brand stands behind their product. It gives you peace of mind.
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Installation Ease: Some gear sets come with master bearing kits or are designed for easy swap. This saves time and reduces hassle.
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Noise and Smoothness: Quality gears run quietly and smoothly. This improves your driving comfort and reduces wear on parts.
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Compatibility: Confirm the gear set replaces your OEM or popular aftermarket parts. This ensures a perfect fit and reliable performance.
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Use Case: Think about how you use your vehicle. Heavy towing, off-roading, or daily driving all need different gear strengths and ratios.
Choosing the right 31-spline 12-bolt gears transforms your vehicle. You get better power, reliability, and a smoother ride every time you drive.