aFe Pro Series Rear Differential Cover Kit

Fits Most Dodge/Ram 5.9L Diesel/5.7L (03-13)

Part #: 46-70092-WL

Overview

The aFe Pro Series Rear Differential Cover Kit is a premium upgrade designed specifically for 2003 to 2005 Dodge Ram 2500 and Ram 3500 trucks. This high-quality differential cover enhances the durability and performance of your vehicle’s rear differential by increasing fluid capacity and improving heat dissipation. Engineered for truck owners who demand reliability under heavy loads and extreme conditions, it helps maintain optimal operating temperatures, reducing wear and extending the life of drivetrain components.

Ideal for those who tow, haul, or drive in demanding environments, the aFe Pro Series cover provides superior cooling and protection compared to the factory stamped steel cover, ensuring your differential stays cooler and better lubricated during intense use.

Key Features

This rear differential cover kit incorporates advanced features to maximize performance and ease of maintenance:

• Machined cooling fins cast into the aluminum cover for efficient heat transfer away from differential fluid
• Increased fluid capacity to improve lubrication and cooling without requiring dipstick modifications
• Magnetic drain plug to capture metal particles and simplify fluid changes
• Temperature sensor port (1/8" NPT) for easy monitoring of differential fluid temperature
• Reinforced ribs integrated into the design for enhanced structural strength and durability
• Wrinkle black powder coated finish for corrosion resistance and a rugged, professional appearance
• Includes premium gear oil to ensure proper lubrication upon installation
• Direct replacement for the stock stamped steel cover with a high-quality die-cast aluminum alternative
• 50-state legal and backed by a 2-year limited warranty

Construction & Design

The aFe Pro Series Rear Differential Cover is crafted from rugged die-cast A380 aluminum, prized for its excellent strength-to-weight ratio and superior thermal conductivity. The precision-machined cooling fins are integrated directly into the cover, providing significantly better heat dissipation than standard stamped steel covers. Reinforced ribs add rigidity to withstand harsh driving conditions and protect internal differential components from damage.

The wrinkle black powder coated finish not only enhances corrosion resistance but also maintains a clean, durable look that complements the tough styling of Dodge Ram trucks. The magnetic drain plug and temperature sensor port are thoughtfully incorporated to facilitate maintenance and fluid temperature monitoring without compromising the cover’s structural integrity.

Installation & Fitment

Designed as a direct replacement for the factory rear differential cover on 2003 to 2005 Dodge Ram 2500 and Ram 3500 models, this kit installs easily using common hand tools. No modifications to the differential housing or dipstick are required, making installation straightforward for both professional mechanics and experienced DIY enthusiasts. The included gear oil ensures your differential is properly lubricated immediately after installation.

What's Included

• Pro Series finned aluminum rear differential cover
• Magnetic drain plug
• Temperature sensor port plug (1/8" NPT)
• Gear oil
• Installation hardware

Ideal For

This rear differential cover kit is ideal for Dodge Ram 2500 and 3500 owners who frequently tow heavy loads, drive off-road, or operate their trucks in high-temperature environments. It is also well-suited for enthusiasts seeking to upgrade their vehicle’s drivetrain protection and cooling capabilities to extend the life of their differential and improve overall reliability under demanding conditions.

aFe POWER (Advanced FLOW Engineering) offers dyno-proven intake, filtration, and exhaust upgrades aimed at measurable performance gains. The brand’s lineup is geared toward enthusiasts looking for better airflow, improved sound, and durable materials—from cold air intakes to stainless exhaust systems for street and track applications.