PPE Heavy-Duty Cast Aluminum Rear Differential Cover AAM 11.5"-14-Bolt 01-19 GM 2500HD/3500 | 01-18 Ram 2500/3500

Improve differential cooling and drivetrain protection with the PPE Heavy-Duty Cast Aluminum Rear Differential Cover for 2001–2019 GM and 2001–2018 Ram trucks equipped with an AAM 11.5-inch, 14-bolt rear axle. Constructed from premium A356.0-T6 heat-treated cast aluminum, this upgraded cover is engineered to help manage differential temperatures, increase fluid capacity, and provide added strength for towing, hauling, and performance applications. The precision-cast design features external cooling fins that help dissipate heat, while internal windage scrapers help control fluid movement around the gears. By reducing excessive fluid churning and aeration, the scrapers help minimize heat buildup and parasitic power loss. Together, the internal scrapers and external fins create a reinforced cross-bracing structure for improved rigidity and impact resistance. This PPE differential cover increases fluid capacity by approximately 0.63 quart, providing additional thermal capacity for demanding driving conditions. Cast-in gussets reinforce the differential housing flange, while stainless steel service plugs feature high-temperature neodymium magnets to capture ferrous metal particles from the differential fluid. Viton O-rings help provide a secure seal at the service plugs. Designed as a heavy-duty upgrade for compatible GM and Ram trucks, the PPE Cast Aluminum Rear Differential Cover combines improved heat management with durable construction to help protect critical drivetrain components over the long haul.