Description
aFe POWER Front & Rear Diff GUARD Package w/ Oil – Black w/ Machined Fins
Provide complete, performance-driven protection for your drivetrain with the aFe POWER Front & Rear Diff GUARD Package, engineered for 2011–2019 Chevrolet Silverado and GMC Sierra 2500HD/3500HD Duramax trucks. This all-in-one differential service kit delivers increased strength, improved cooling, and premium lubrication for demanding towing, hauling, and off-road conditions.
Complete Ready-to-Install Differential Protection Kit
This comprehensive package includes front and rear Pro Series differential covers, all required mounting hardware, and 6 quarts of PROGUARD Synthetic 75W-90 gear oil, giving you everything needed for a complete front and rear axle service in one convenient kit.
Heavy-Duty Cast Aluminum Construction
Both differential covers are manufactured from durable cast aluminum and feature reinforced ribbing for maximum strength and rigidity. The robust design helps protect internal components from flex, impact, and thermal stress under extreme operating conditions.
Advanced Cooling & Increased Oil Capacity
Integrated internal and external cooling fins increase surface area to efficiently dissipate heat, helping maintain optimal gear oil temperatures. The Pro Series covers also increase oil capacity over stock, improving lubrication and thermal stability during extended or high-load use.
Precision Fluid Control & Easy Maintenance
Each cover features a large oil level sight glass for quick visual inspection and a factory-calibrated oil level plug to eliminate guesswork and prevent overfilling. Neodymium magnetic drain and deep-reach fill plugs capture metallic debris and contaminants, providing superior gear protection and long-term reliability.
Premium Black Powder-Coated Finish
Finished in a black powder coat with precision-machined fins, these differential covers deliver excellent corrosion resistance and a bold, performance-inspired appearance that complements any undercarriage.
PROGUARD Synthetic 75W-90 Gear Oil Included
The included PROGUARD Synthetic 75W-90 gear oil exceeds API GL-5 specifications and is compatible with both open and limited-slip differentials, ensuring maximum protection and performance for both front and rear axles.
Kit Includes
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Front AAM 9.25" / 12-Bolt IFS Pro Series Differential Cover
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Rear AAM 11.5" / 14-Bolt Pro Series Differential Cover
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6 quarts PROGUARD Synthetic 75W-90 Gear Oil
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Magnetic drain and fill plugs
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Oil level sight glasses and calibration plugs
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All required mounting hardware
Fitment
Designed for 4x4 trucks only equipped with:
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Front: AAM 9.25" / 12-Bolt IFS axle
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Rear: AAM 11.5" / 14-Bolt axle
Vehicle Applications:
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2011–2019 Chevrolet Silverado 2500 HD – 6.6L Duramax
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2011–2019 Chevrolet Silverado 3500 HD – 6.6L Duramax
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2011–2019 GMC Sierra 2500 HD – 6.6L Duramax
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2011–2019 GMC Sierra 3500 HD – 6.6L Duramax
Please verify axle configuration prior to ordering.
Emissions Compliance
This product does not require a CARB EO#.
When complete drivetrain protection matters most, trust aFe POWER Pro Series Diff GUARD components to deliver unmatched strength, cooling, and reliability.
