aFe Pro Series Rear Differential Cover

1994–2002 Dodge Ram 2500 / 3500 5.9L Diesel

Part #: 46-70032

Overview

The aFe Pro Series Rear Differential Cover is a premium upgrade engineered specifically for Dodge Ram 2500 and 3500 trucks equipped with the 5.9L diesel engine from 1994 to 2002. Designed to enhance the durability and performance of your vehicle’s rear differential, this cover increases fluid capacity and improves cooling efficiency to help maintain optimal operating temperatures. It is an ideal solution for truck owners who demand reliability and longevity from their drivetrain components, especially under heavy towing, off-road, or demanding daily driving conditions.

By reducing heat buildup and providing superior protection, the aFe Pro Series cover helps extend the life of your rear differential while delivering peace of mind during rigorous use. Its robust construction and functional design make it a smart upgrade for anyone looking to improve the performance and resilience of their Dodge Ram’s rear axle.

Key Features

Combining advanced engineering with practical enhancements, the aFe Pro Series Rear Differential Cover offers the following key features:

• Machined cooling fins cast directly into the aluminum cover for superior heat dissipation
• Increased fluid capacity to enhance lubrication and cooling efficiency
• Magnetic drain plug designed to capture metal particles and simplify fluid changes
• Temperature sensor port (1/8" NPT) for real-time monitoring of differential fluid temperature
• Reinforced ribs integrated into the design for added strength and durability
• Wrinkle black powder coated finish for corrosion resistance and a rugged appearance
• Die-cast A380 aluminum construction for a balance of strength and lightweight performance
• Includes an O-ring for a reliable, leak-free seal
• Compatible with the stock dipstick, requiring no modifications despite increased fluid volume
• Backed by a 2-year limited warranty for added confidence

Construction & Design

Manufactured from high-quality die-cast A380 aluminum, the aFe Pro Series Rear Differential Cover is built to withstand the rigors of heavy-duty use. The die-casting process ensures precise dimensions and consistent quality, while the integrated machined cooling fins and reinforced ribs provide excellent thermal management and structural integrity. The wrinkle black powder coated finish protects against corrosion and environmental damage, while adding a professional, rugged look that complements the undercarriage of your Dodge Ram.

The strategically placed magnetic drain plug attracts and holds metal debris, helping to prevent premature wear inside the differential. Additionally, the built-in temperature sensor port allows for easy installation of a temperature gauge or sensor, enabling you to monitor fluid temperatures and maintain optimal operating conditions.

Installation & Fitment

The aFe Pro Series Rear Differential Cover is designed as a direct replacement for the factory rear differential cover on 1994–2002 Dodge Ram 2500 and Ram 3500 trucks with the 5.9L diesel engine. Installation is straightforward and requires no modifications to the vehicle or existing components. Despite the increased fluid capacity, the cover remains compatible with the stock dipstick, making the upgrade hassle-free.

All necessary installation hardware is included. However, the pan gasket, spin-on filter, and pickup screen must be sourced separately to complete the installation.

What's Included

• Pro Series Rear Differential Cover with machined cooling fins
• Magnetic drain plug
• Temperature sensor port plug (1/8" NPT)
• O-ring seal
• Installation hardware

Ideal For

This differential cover is perfect for Dodge Ram 2500 and 3500 owners seeking to improve the reliability and longevity of their rear differential. It is especially beneficial for those who tow heavy loads, frequently drive off-road, or operate their trucks in demanding conditions where heat buildup can accelerate wear. The enhanced cooling and increased fluid capacity help maintain optimal differential temperatures, reducing the risk of overheating and component failure while providing durable protection for your drivetrain.

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.