GMC Sierra Ring & Pinion Set - Rear - Revolution Gear & Axle - 5.13 Ratio Thick - `99-`10. A direct-fit ring and pinion package for 1999–2010 GM 14-bolt 10.5" rear axles, offered by Revolution Gear & Axle for drivers who need a stronger gear option for towing, hauling, or gearing changes.

This 5.13 ratio thick-cut ring & pinion set is intended for enthusiasts looking to modify rear-end gearing on compatible GMC Sierra models. The higher numerical ratio provides increased low-end torque for better performance under load and altered driveline gearing suited to heavier towing or to match larger tire sizes. Designed specifically for GM 14-bolt 10.5" rear axles, this set is a focused choice when planning gear swaps or axle rebuilds.

Features

• Fits GM 14-bolt 10.5" rear axles on 1999–2010 GMC Sierra models
• 5.13 gear ratio for increased low-end torque and load hauling
• “Thick” style ring & pinion intended for robust drivetrain needs
• Manufactured by Revolution Gear & Axle for direct-fit installation

If you have questions about fitment, installation, or pairing this set with lockers or differentials, call us directly — we’re happy to help. Our two installation and customization locations are in Austin, Texas and the Los Angeles, California area. Call: 512-982-9393 (TX) or 562-981-6800 (CA). If you are considering purchasing multiple items, contact us for possible shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov