Selecting the correct ring and pinion gears is crucial for optimizing your vehicle's performance and drivetrain efficiency. These gears are fundamental to how your vehicle transfers power from the engine to the wheels. Making an informed choice ensures compatibility, longevity, and the desired driving characteristics for your specific needs.
- USA Standard ring and pinion sets are the right choice to add confidence to your install
- USA Standard Gear offers a full line of ring and pinion sets for a variety of common and hard to find applications
- USA standard gear offers a standard one year against defects on their ring and pinion sets
- This product is used in a 3. 73 axle ratio
- 12 Ring Gear Bolts
- BRAND NEW GM 8.5" 10-Bolt Ring & Pinion & Master Bearing/Installaton Kit
- 3.73 Ratio
- Master Bearing/Installation Kit Includes: Carrier Bearings/Races, Pinion Bearings/Races, Pinion Seal, Pinion Nut, Pinion Shims, Crush Sleeve, Carrier Shims, Ring Gear Bolts, Gasket, Marking Compound, Brush & Lock-Tite
- This Bearing kit will fit stock carriers. For aftermarket Eaton/Auburn Posi Units with HD Bearings see other listings.
- Fits GM 8.5" and 8.6" differentials
- 3.73 ratio
- 30 spline pinion
- 10 ring gear bolts
- 8.50" ring gear diameter
- 8.50" ring gear diameter
- Fits GM 8.5" and 8.6"
- 10 ring gear bolts
- 30 spline pinion
- 3.42 ratio
- ✅ Precision Fit & Performance – Motive Gear 3.42 Ring & Pinion Set fits GM 8.5"/8.625" (10-bolt), ensuring superior strength, smooth operation & optimized torque transfer for daily driving & performance needs.
- ✅ Durable 8620 Steel Construction – Manufactured from high-strength 8620 steel, heat-treated for extreme durability, wear resistance & longevity, providing reliable performance under heavy loads & tough conditions.
- ✅ OE Direct Fit & Easy Installation – Designed for seamless installation, fits GM 8.5"/8.625" differentials requiring a 2.73+ ratio carrier, replacing OE parts with precision engineering for factory-like performance.
- ✅ Compatible with Multiple GM Vehicles – Fits Chevrolet, GMC, Cadillac, Buick, Pontiac & Oldsmobile models (1970-2020), including Silverado, Tahoe, Blazer, Camaro, Yukon, Escalade, Impala & more—check full list!
- ✅ 1-Year/50,000-Mile Warranty – Backed by a trusted warranty for worry-free performance. Motive Gear ensures top-tier quality, making it the go-to choice for professional mechanics & performance enthusiasts. 🚗
- ✅ Motive Gear 3.73 Ring & Pinion – Precision-engineered for Ford 8.8" 10-bolt differentials, enhancing torque, strength & performance for smooth operation in daily & performance vehicles.
- ✅ Premium 8620 Steel Construction – Built for extreme durability, heat-treated for wear resistance & longevity, ensuring reliable performance under heavy loads & challenging conditions.
- ✅ OE Direct Fit & Simple Installation – Designed for a seamless fit, replaces OE parts with precision machining for factory-like performance & hassle-free installation.
- ✅ Compatible with Ford & More (1980-2020) – Fits Ford, Lincoln, Mazda & Mercury models, including F-150, Mustang, Crown Victoria, Ranger, Explorer & more—verify fitment details.
- ✅ Replaces Richmond Gear 49-0104-1, Motive Gear F8.8-373, EXCEL from Richmond F88373, Motive Gear F888373.
- ✅ Motive Gear 3.73 Ring & Pinion – Precision-engineered for GM 8.5"/8.625" 10-bolt differentials, ensuring enhanced torque, strength & smooth performance.
- ✅ Heavy-Duty 8620 Steel – Built for extreme durability, heat-treated for wear resistance & longevity under demanding driving conditions.
- ✅ OE Direct Fit & Simple Installation – Designed for a seamless fit, replaces OE parts with precision machining for factory-like performance.
- ✅ Compatible with GM Models (1970-2007) – Fits Buick, Cadillac, Chevrolet, GMC, Oldsmobile & Pontiac vehicles, including Silverado, Tahoe, Camaro, Firebird & more.
- ✅ Replaces GM 12471280, Yukon Gear YG GM8.5-373, Richmond Gear 49-0041-1 & more.
- ✅ Motive Gear 3.73 Ring & Pinion – Precision-engineered for GM 8.5"/8.625" 10-bolt differentials, offering enhanced torque, strength & performance for smooth operation in daily & performance vehicles.
- ✅ Premium 8620 Steel Construction – Built for extreme durability, heat-treated for wear resistance & longevity, ensuring reliable performance under heavy loads & challenging driving conditions.
- ✅ OE Direct Fit & Simple Installation – Designed for a seamless fit, works with 2.73+ carrier ratios, replacing OE parts with precision machining for factory-like performance & hassle-free installation.
- ✅ Compatible with GM Vehicles (1970-2020) – Fits Chevrolet, GMC, Cadillac, Buick, Pontiac & Oldsmobile models, including Silverado, Tahoe, Yukon, Escalade, Camaro, Impala & more—verify fitment details.
- ✅ Replaces GM 26037712, 26066706, Richmond Gear 49-0041-1, Dorman 697-301, Motive Gear GM10-373, EXCEL from Richmond GM85373.
- PERFECT FIT: Rotation: Standard; Ring Gear Outside Diameter: 8.75"; Ratio: 4.3; Pinion Gear Tooth Quantity: 10; Ring Gear Tooth Quantity: 43 **Please Note: Before purchasing, verify correct fitment for your specific vehicle application using the Amazon...
- UNLEASH YOUR BEAST: Motive Gear Ring and Pinion sets are engineered for the toughest conditions, giving your differential the power and durability it needs to dominate the road, track, or trail.
- UNRIVALED PERFORMANCE: Whether you're burning rubber on the street, conquering off-road terrain, or setting records at the track, Motive Gear ring and pinion sets deliver the high-performance, optimal spline count, and quality that serious gearheads...
- CUTTING-EDGE DESIGN: Motive Gear uses the latest designs and manufacturing technologies to create gears that run quietly, with precise rotation and a strong diameter, making setup a breeze so you can spend less time in the garage and more time behind the...
- BUILT TO LAST: Every Motive Gear ring and pinion set comes with a standard one-year warranty, ensuring your vehicle is ready to roll with confidence.
- Excel
- Ring and Pinion
- Gear Set
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Last update on 2026-08-31 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Automotive Replacement Ring & Pinion Gears
Understanding Gear Ratios
The gear ratio, represented as two numbers (e.g., 4.10:1), indicates how many times the pinion gear must turn to complete one full rotation of the ring gear. A lower numerical ratio (e.g., 3.55:1) results in higher top speed and better fuel economy on the highway, while a higher numerical ratio (e.g., 4.56:1) provides better acceleration and towing power, especially with larger tires.
Material and Durability
Ring and pinion gears are typically made from hardened steel alloys for strength and wear resistance. High-performance applications or heavy-duty use may benefit from gears forged from premium alloys or those with specialized heat treatments. Consider the intended use of your vehicle – daily driving, off-roading, or racing – when evaluating material quality and expected lifespan.
Compatibility and Fitment
Ensuring the gears are compatible with your vehicle's differential housing and axle type is paramount. Different manufacturers and models use specific spline counts for the pinion shaft and ring gear, as well as different carrier breaks. Always verify the exact specifications for your vehicle's make, model, year, and drivetrain configuration before purchasing.
Purpose and Driving Style
Your driving habits and intended modifications should guide your gear ratio selection. If you've upgraded to larger tires, a numerically higher gear ratio is often necessary to restore lost acceleration and towing capability. For increased fuel efficiency on the highway without major modifications, a numerically lower ratio might be suitable. Towing applications generally benefit from higher ratios for better torque multiplication.
