PPE Rear Differential Cover - GM C/K 20/30 and 2500/3500 HD 10.5" 1988-2016

PPE Cast Aluminum Rear Differential Cover

Upgrade the protection and cooling capacity of your differential with the PPE Cast Aluminum Rear Differential Cover for 1988-2021 GM AAM 10.5" 14-Bolt rear axles. Constructed from premium A356.0-T6 heat-treated aluminum alloy, this heavy-duty cover increases fluid capacity, improves heat dissipation, and strengthens the differential housing for demanding towing, hauling, and performance applications.

Key Features

• Manufactured from premium A356.0-T6 heat-treated cast aluminum alloy
• Precision-cast using permanent steel molds for exceptional strength and dimensional accuracy
• Increases differential fluid capacity by 0.65 quart
• Half-inch external cooling fins improve heat dissipation and impact resistance
• Internal windage scrapers reduce fluid aeration, heat generation, and parasitic power loss
• Cross-bracing design formed by external fins and internal scrapers increases housing rigidity
• Cast-in gussets provide additional flange support and structural strength
• 304 stainless steel fill and drain plugs with high-temperature neodymium magnets
• Viton O-rings ensure reliable, leak-free sealing
• Factory-level fill plug placement simplifies fluid servicing

Benefits

By increasing fluid capacity and improving cooling efficiency, this differential cover helps maintain proper lubrication and reduce operating temperatures under heavy loads. Internal windage scrapers improve fluid control and power transfer efficiency, while integrated magnetic service plugs capture harmful metal particles to help extend differential life and performance.

Fitment

Fits 1988-2021 GM trucks equipped with the AAM 10.5" 14-Bolt rear axle.

What's Included

• PPE cast aluminum rear differential cover
• Magnetic fill plug with Viton O-ring
• Magnetic drain plug with Viton O-ring