2001-2019 GM HD, 2001-2018 Ram HD AAM 11.5" 14-Bolt Heavy-Duty Cast Aluminum Rear Differential Cover Black (138051020)

Description

Heavy-duty flat back rear differential cover for 2001-2019 GM and 2001-2018 RAM 2500/3500 trucks with the AAM 11.5 inch 14-bolt axle.

Excessive heat can degrade the protective qualities of differential fluid, leading to accelerated wear of gears and bearings. Cast from high-grade A356.0-T6 aluminum alloy, this flat back differential cover adds .75 quart of fluid capacity and features half-inch external cooling fins for long-lasting heat management and performance.

Built-in windage scrapers inside the PPE cover ensure precise fluid distribution around the gears. By reducing excessive fluid churning, these scrapers lower heat buildup and minimize parasitic loss. Together with the vertical external fins, they form a strong cross-bracing structure that improves load distribution and enhances impact resistance.

The fill plug is positioned at the factory level. Both the fill and drain plugs feature a high-temperature-rated neodymium magnet that captures ferrous particles for added protection.

Note: Only works with vehicles equipped with AAM 11.5 inch 14-bolt axles. Not compatible with RAM 2500/3500 with coil-spring rear suspension.

Features

• Heavy-Duty Aluminum Rear Differential Cover - Black (138051020)
• Neodymium magnet equipped fill plug
• Internal and external cooling fins
• Stainless steel Allen head fasteners
• Black Powdercoat Finish
• Sold As A Kit