PPE HD Cast Aluminum Rear Differential Cover

1994–2025 Dodge Ram 1500 9.25" 12-Bolt Rear Differential

Part #: 238051320

Overview

The PPE HD Cast Aluminum Rear Differential Cover is a robust upgrade engineered specifically for Dodge Ram 1500 trucks equipped with the 9.25" 12-bolt rear differential from 1994 through 2025. Designed to enhance durability and thermal management, this heavy-duty cover protects your differential from impacts and heat-related wear while increasing fluid capacity for improved lubrication. It is ideal for truck owners who demand reliable performance during heavy towing, hauling, or off-road driving where excessive heat can degrade differential components and compromise traction.

By improving heat dissipation and fluid circulation, the PPE differential cover helps extend the life of gears, bearings, and limited-slip clutch packs. This ensures consistent power transfer and traction control, making it an essential upgrade for enthusiasts and professionals seeking long-term reliability and reduced maintenance intervals.

Key Features

This rear differential cover incorporates advanced engineering to optimize protection and cooling performance:

• Constructed from high-grade A356.0-T6 cast aluminum for superior strength and corrosion resistance
• Increases fluid capacity by 0.5 quarts to enhance lubrication and cooling efficiency
• Half-inch external cooling fins improve heat dissipation and maintain optimal operating temperatures
• Internal windage scrapers reduce fluid churning, lowering heat buildup and parasitic power loss
• Strong cross-bracing structure 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

Construction & Design

The PPE differential cover is precision cast from premium A356.0-T6 aluminum alloy, known for its excellent strength-to-weight ratio and thermal conductivity. This material choice ensures the cover withstands harsh operating conditions while effectively dissipating heat generated during heavy use. The half-inch external cooling fins increase surface area for superior heat transfer, while the vertical fins also serve as a robust cross-bracing system that enhances structural rigidity and protects the differential housing from impacts and deformation.

Internally, windage scrapers are engineered to direct fluid flow precisely around the gears, minimizing turbulence and reducing heat generation. This thoughtful design helps maintain optimal fluid temperatures, extending the life of internal components and improving overall differential performance.

Installation & Fitment

The PPE Rear Differential Cover is a direct bolt-on replacement for Dodge Ram 1500 trucks equipped with the 9.25" 12-bolt rear differential from 1994 through 2025. Installation requires no modifications, making it a straightforward upgrade for both DIY enthusiasts and professional mechanics. Factory-positioned fill and drain plugs simplify fluid servicing and maintenance, ensuring hassle-free installation and upkeep.

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 perfect for Dodge Ram 1500 owners who frequently tow, haul heavy loads, or drive off-road and require enhanced differential protection and cooling. It benefits those looking to extend the life of their differential components, improve traction control reliability, and reduce maintenance intervals caused by heat-related fluid degradation. Whether you drive a 5.2L V8, 5.7L Hemi, 5.9L V8, 4.7L V8, or 3.0L EcoDiesel engine, this cover offers a durable and efficient solution to safeguard your rear differential.

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.