PPE HD Cast Aluminum Rear Differential Cover

2001–2019 Dodge Ram 5.9L Diesel, 5.9L V8, 8.0L V10, 6.7L Diesel, 5.7L Hemi | Chevrolet Silverado / GMC Sierra 2001–2019

Part #: 238051020

Overview

The PPE HD Cast Aluminum Rear Differential Cover is a robust upgrade engineered for heavy-duty AAM 11.5"-14 bolt rear axles found in Dodge Ram, Ram, Chevrolet Silverado, and GMC Sierra trucks from 2001 through 2019. Designed to enhance the durability and efficiency of your vehicle’s differential, this cover combats excessive heat buildup that can degrade fluid quality and accelerate wear on internal components.

Ideal for truck owners who demand enhanced reliability and longevity from their drivetrain, this differential cover improves heat dissipation, increases fluid capacity, and offers superior protection for gears and bearings. Whether towing heavy loads, hauling cargo, or tackling off-road terrain, the PPE cover helps maintain optimal differential performance under the most demanding conditions.

Key Features

Engineered with precision and advanced design elements, the PPE Rear Differential Cover delivers multiple benefits that improve your vehicle’s rear axle system:

• Constructed from high-grade A356.0-T6 cast aluminum for exceptional strength and lightweight durability
• Increases differential fluid capacity by 0.63 quarts to enhance lubrication and cooling efficiency
• Half-inch external cooling fins maximize heat dissipation to prevent fluid breakdown and reduce component wear
• Internal windage scrapers reduce fluid churning, lowering heat buildup and minimizing parasitic power loss
• Strong cross-bracing structure formed by vertical fins improves load distribution and impact resistance
• Factory-level fill plug placement allows for easy fluid maintenance and refilling
• High-temperature neodymium magnets in both fill and drain plugs capture ferrous particles to protect gears and bearings
• Designed exclusively for vehicles equipped with AAM 11.5”-14 bolt rear axles
• Note: Not compatible with certain 2003–2012 Dodge Ram HD trucks with Anti-Spin Differential Rear Axles due to tone ring sensor interference

Construction & Design

The PPE Rear Differential Cover is precision cast from aerospace-grade A356.0-T6 aluminum alloy, renowned for its superior strength-to-weight ratio and corrosion resistance. Its robust cast design incorporates half-inch external cooling fins that significantly increase surface area for heat dissipation, helping maintain lower operating temperatures during heavy-duty use.

Inside the cover, integrated windage scrapers carefully manage fluid flow to ensure consistent lubrication while reducing turbulence that can cause heat and drag. The vertical fins serve a dual purpose by acting as structural reinforcements, providing enhanced rigidity and impact resistance to safeguard the differential housing from road debris and rough terrain.

Both the fill and drain plugs feature powerful high-temperature neodymium magnets that trap metal particles suspended in the fluid, preventing premature wear of differential gears and bearings and extending component life.

Installation & Fitment

The PPE Rear Differential Cover is designed for direct bolt-on installation with no modifications required on compatible vehicles. It fits Dodge Ram models from 2001 to 2005 (including 5.9L Diesel, 5.9L V8, and 8.0L V10 engines), Ram trucks from 2008 to 2018 (including 6.7L Diesel and 5.7L Hemi engines), and Chevrolet Silverado and GMC Sierra trucks from 2001 to 2019 equipped with AAM 11.5”-14 bolt rear axles.

Installation involves draining the existing differential fluid, removing the factory cover, and bolting on the PPE cover using the supplied hardware. The precisely positioned fill plug allows for easy refilling to the factory recommended fluid level. Please note this cover is not compatible with certain 2003–2012 Dodge Ram HD trucks equipped with Anti-Spin Differential Rear Axles due to tone ring sensor interference; alternative part numbers are recommended for those applications.

What's Included

• One PPE Rear Differential Cover (cast aluminum)
• Fill plug with high-temperature neodymium magnet
• Drain plug with high-temperature neodymium magnet
• Installation hardware
• Detailed installation instructions

Ideal For

This rear differential cover is perfect for truck owners who frequently tow heavy loads, drive off-road, or operate their vehicles in demanding environments where heat buildup can compromise differential performance. It is especially beneficial for those looking to extend the life of their differential components by improving fluid cooling and filtration, ensuring reliable traction and power transfer under all conditions.

Pacific Performance Engineering (PPE) develops heavy-duty and performance upgrades for trucks and diesel platforms, including differential covers, transmission pans, oiling and cooling components, and other durability-minded parts. PPE products are built to handle heat, load, and power—ideal for tow rigs and performance builds that need stronger hardware and better fluid control.