PPE Heavy-Duty Cast Aluminum Rear Differential Cover

2019–2024 Ram 2500 / 3500 6.4L 392 / 6.7L Diesel

Part #: 238053020

Overview

The PPE Heavy-Duty Cast Aluminum Rear Differential Cover is engineered specifically for Dodge Ram 2500 and 3500 models from 2019 through 2024 equipped with either the 6.4L 392 HEMI or 6.7L Diesel engines. This premium differential cover enhances the durability and performance of your truck’s rear differential by addressing heat buildup, a common cause of fluid degradation and accelerated wear on internal components.

Designed for truck owners who demand reliability under heavy towing, hauling, or off-road conditions, this cover improves heat dissipation and increases fluid capacity to protect gears, bearings, and limited-slip clutch packs. Upgrading to the PPE differential cover helps maintain optimal differential fluid effectiveness, extends the life of your drivetrain components, and supports improved traction and drivetrain efficiency.

Key Features

Built with advanced engineering and premium materials, the PPE Heavy-Duty Rear Differential Cover offers the following benefits:

• Constructed from high-grade A356.0-T6 cast aluminum alloy for exceptional strength and corrosion resistance
• Increases differential fluid capacity by 0.7 quarts to enhance lubrication and cooling
• Half-inch external cooling fins maximize heat dissipation to maintain optimal fluid temperatures during demanding use
• Integrated internal windage scrapers reduce fluid churning, lowering heat buildup and parasitic power loss
• Strong cross-bracing formed by vertical external fins improves load distribution and impact resistance
• Factory-positioned fill plug allows for easy and accurate fluid maintenance
• High-temperature-rated neodymium magnets in both fill and drain plugs capture ferrous particles to protect internal components
• Direct OEM replacement with part numbers 68458937AB, 68458937AA, and 68458238AA

Construction & Design

The differential cover is precision cast from A356.0-T6 aluminum alloy, known for its excellent strength-to-weight ratio and resistance to corrosion and thermal stress. Its robust design features half-inch external cooling fins that significantly increase surface area, promoting superior heat dissipation to keep differential fluid cooler under heavy loads and off-road conditions.

Inside, integrated windage scrapers are engineered to direct fluid flow efficiently around the gears, minimizing turbulence and reducing heat generation caused by excessive fluid churning. This not only improves cooling efficiency but also enhances drivetrain power transfer by reducing parasitic losses. The vertical fins also serve as structural reinforcements, providing added rigidity and protecting the differential housing from impacts and deformation.

Installation & Fitment

The PPE Heavy-Duty Rear Differential Cover is a direct bolt-on replacement designed specifically for 2019–2024 Dodge Ram 2500 and 3500 trucks with 6.4L 392 HEMI or 6.7L Diesel engines. Installation requires no modifications and can be completed using standard hand tools. Factory-positioned fill and drain plugs simplify fluid servicing, making maintenance straightforward and mess-free. This upgrade is suitable for both professional mechanics and experienced DIY enthusiasts seeking to improve rear differential durability and cooling performance.

What's Included

• Heavy-duty cast aluminum rear differential cover
• Fill plug with high-temperature neodymium magnet
• Drain plug with high-temperature neodymium magnet
• Installation hardware
• Detailed installation instructions

Ideal For

This differential cover is ideal for Dodge Ram 2500 and 3500 owners who frequently tow heavy trailers, haul substantial loads, or drive off-road and require enhanced rear differential protection and cooling. It is also well-suited for enthusiasts aiming to maintain optimal limited-slip differential performance by preventing clutch pack degradation caused by excessive heat. Whether your Ram is a work truck, weekend warrior, or daily driver, the PPE Heavy-Duty Rear Differential Cover provides peace of mind through improved durability, cooling efficiency, and drivetrain longevity.

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.