Protector AAM 11.5 in Differential Cover Assembly

Features:

• Direct-fit differential cover for AAM 11.5" rear axles

• Increases fluid capacity for improved thermal management

• Cast aluminum construction resists warping and cracking

• Built-in internal and external cooling fins

• Magnetic drain plug for simplified maintenance

• Reinforced flange to prevent housing flex

• Black powder-coated finish for corrosion resistance

• Designed and manufactured by ATS Diesel Performance

AAM 11.5" Rear Axle

Boost your differential’s performance and protection with the ATS 402-900-2272 Protector Differential Cover. Designed for the AAM 11.5" rear axle found in 2003–2019 Ram 2500 and 3500 trucks, this high-capacity, heavy-duty diff cover improves fluid cooling, adds strength to the housing, and increases oil capacity for enhanced durability under towing, hauling, and high-performance driving. Constructed from high-strength cast aluminum, the ATS Protector features internal cooling fins, reinforced bolt flanges, and a built-in magnetic drain plug for easier servicing. It’s a must-have upgrade for diesel owners who demand longevity and protection from their drivetrain components, whether you're towing heavy loads or running upgraded power levels.

Fitment:
2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Dodge Ram 2500/3500 with AAM 11.5" rear differential

Notes:

• Verify your truck uses the AAM 11.5" rear axle before purchase
• Not compatible with trucks using independent rear suspension
• Primarily intended for diesel models; check axle on gas trucks
• Does not currently fit 2020 or newer Ram 2500/3500 models
• Installation may require fresh gear oil and gasket material
• Confirm rear axle clearance with aftermarket suspension components
• Includes a magnetic drain plug but reuse of stock hardware may vary
• Ensure your axle is not equipped with a factory finned aluminum cover
• Contact ATS Diesel for warranty details and technical support