2001-2015 GM Sierra/Silverado Nitro Gear & Axle AAM 11.5" Ring & Pinion Gear (3.73 Ratio) AAM11.8-373-NG

GM Sierra/Silverado Nitro Gear & Axle Ring & Pinion Gear Set Features:

• Heat and friction resistant
• Made from premium 8620 steel
• CNC-machined construction
• Tested for durability
• 30 Spline
• 12 ring gear bolts
• Straightforward installation

High-Quality Aftermarket Gear Set for Performance

When you need a more aggressive launch, improved acceleration, or simply need to compensate for larger tire and wheel combinations, jumping to a set of 3.73 Ratio gears will take you further so you can explore more. Using CNC machined designed techniques and only the best materials, Nitro Gear & Axle has created their 11.5" Ring & Pinion Gear Set to help improve the overall performance and efficiency of your truck's drivetrain. The altered power band of this gear set helps improve the towing and hauling capabilities of your ride by giving your Sierra/Silverado a more aggressive operating speed for some extra power through your truck's shifting. The 3.73 ratio is perfect for anybody that values outright performance over improved fuel economy, giving you an extra boost of confidence each time you set off for adventure. Carefully designed for a perfect fit and function, these gears offer a direct replacement of your existing parts in practically no time at all.

Premium Steel Construction & Warranty Info

Nitro Gear & Axle developed their AAM 11.5" Ring & Pinion Gear using only premium materials and most advanced design processes to ensure maximum strength and long-lasting fucntionlaity on your ride. Each gear set is carefully crafted from high-quality 8620 steel that is perfectly cut using computer-controlled machining before being triple lapped and Rockwell tested for hardness and durability. The premium construction results in an excellent fit, ideal contact pattern, and quiet operation each time you get behind the wheel. Installation is made simple and straightforward as Nitro Gear includes all of the necessary hardware and instructions required for the job, making for a simple and straightforward process you can complete at home. Best of all, this kit comes backed by a 2-Year Limited Warranty to help keep your investment protected.

Vehicle Fitment:

• 2001-2015 GMC Sierra 2500HD/3500HD w/ Duramax
• 2001-2015 GMC Sierra 2500HD/3500HD w/ Vortec 8.1L Big Block
• 2001-2015 Chevrolet Silverado 2500HD/3500HD w/ Duramax
• 2001-2015 Chevrolet Silverado 2500HD/3500HD w/ Vortec 8.1L Big Block

Compatible Differentials:

• GM & Chrysler 11.5"/11.8"

Application Note: These Nitro Gears are a true 11.8" diameter gear set and are a direct replacement for your 11.5" factory gear and also a direct replacement for 13-15 AAM 11.8" rear axle.