PPE HD Cast Aluminum Rear Differential Cover

2003–2018 Dodge Ram 5.7L Hemi, 5.9L Diesel, 6.7L Diesel, 8.3L SRT10, 2011–2018 Ram 2500/3500 5.7L Hemi & 6.7L Diesel

Part #: 138051020

Overview

The PPE HD Cast Aluminum Rear Differential Cover is a heavy-duty upgrade engineered for Dodge Ram trucks equipped with AAM 11.5"-14 bolt axle assemblies from 2003 to 2018. Designed to enhance the durability and thermal management of your rear differential, this cover protects vital internal components from excessive heat and wear. It is an ideal solution for truck owners who frequently tow heavy loads, drive off-road, or operate under demanding conditions that generate high differential temperatures.

By improving fluid capacity and cooling efficiency, the PPE differential cover helps extend the lifespan of gears, bearings, and limited-slip clutch packs. This upgrade ensures your drivetrain remains reliable and performs optimally, even under strenuous use.

Key Features

Built with advanced engineering and premium materials, the PPE Rear Differential Cover offers superior protection and performance enhancements:

• Constructed from high-grade A356.0-T6 aluminum alloy for exceptional strength and superior heat dissipation
• Adds 0.75 quart of additional fluid capacity to improve lubrication and cooling efficiency
• Half-inch external cooling fins increase surface area to enhance heat management
• Internal windage scrapers reduce fluid churning, lowering heat buildup and parasitic power loss
• Strong cross-bracing structure formed by vertical fins improves load distribution and impact resistance
• Fill plug positioned at factory fluid level for accurate and easy maintenance
• High-temperature-rated neodymium magnets in both fill and drain plugs capture ferrous particles to protect internal components
• Direct replacement for factory rear differential cover with no modifications required
• Compatible exclusively with Dodge Ram trucks equipped with AAM 11.5”-14 axles; not compatible with Ram 2500/3500 coil-spring rear suspension models

Construction & Design

The PPE rear differential cover is expertly cast from premium A356.0-T6 aluminum alloy, known for its excellent strength-to-weight ratio and outstanding thermal conductivity. This material choice ensures efficient heat dissipation from the differential during heavy-duty operation, reducing the risk of overheating and premature wear.

Its design incorporates half-inch external cooling fins that significantly increase surface area, promoting rapid heat transfer away from the differential fluid and internal components. Inside, windage scrapers control fluid movement to minimize excessive churning, which can generate heat and reduce drivetrain efficiency. Vertical fins not only aid in cooling but also create a robust cross-bracing framework that enhances structural rigidity and impact resistance, protecting the differential from damage in tough environments.

Installation & Fitment

The PPE differential cover is designed as a direct bolt-on replacement for the factory rear differential cover on select Dodge Ram trucks. Installation requires only standard hand tools and no modifications to the axle housing, making it a straightforward upgrade for DIY enthusiasts and professional installers alike.

This cover fits Dodge Ram models from 2003 to 2018 equipped with AAM 11.5"-14 bolt axles, including 5.7L Hemi, 5.9L Diesel, 6.7L Diesel, and 8.3L SRT10 engines. It is not compatible with Ram 2500/3500 trucks featuring coil-spring rear suspension; those applications require a different part number.

What's Included

• One PPE Rear Differential Cover (A356.0-T6 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 Dodge Ram owners who demand enhanced durability and cooling performance from their drivetrain. It is especially suited for those who tow heavy trailers, engage in off-road driving, or operate their trucks in harsh conditions that generate excessive heat in the rear differential. Additionally, enthusiasts seeking to extend the life of their gears, bearings, and limited-slip clutches will benefit from this upgrade’s improved fluid management and structural reinforcement.

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.