aFe Street Series Rear Differential Cover

2003–2005 Dodge Ram 2500 / 3500

Part #: 46-70090

Overview

The aFe Street Series Rear Differential Cover is a robust upgrade designed specifically for 2003 to 2005 Dodge Ram 2500 and Ram 3500 trucks. Engineered to provide superior protection and enhanced cooling, this differential cover is ideal for drivers who demand reliability under heavy-duty conditions. Whether you frequently tow heavy loads, navigate rugged off-road terrain, or drive in hot climates, this cover safeguards your rear axle from rocks, debris, and other hazards that can compromise drivetrain performance.

By increasing the differential fluid capacity and improving heat dissipation, the aFe Street Series cover helps maintain optimal operating temperatures, reducing the risk of overheating during extended use. This combination of protection and thermal management ensures your differential performs efficiently and lasts longer, making it a smart investment for serious truck owners.

Key Features

Built to deliver lasting durability and enhanced functionality, the aFe Street Series Rear Differential Cover includes these standout features:

• Constructed from die-cast A380 aluminum for exceptional strength and corrosion resistance
• Machined external fins increase surface area to improve heat transfer and keep differential fluid cooler
• Large neodymium magnetic drain plug captures metal particles to protect internal gears from wear
• 1/8" NPT calibration plug preset to factory fluid level for easy and accurate filling
• Fully machined groove with supplied O-ring ensures a reliable, leak-free seal
• Designed to fit AAM 10.5-14 bolt axles, matching factory specifications for a perfect fit
• Black powder-coated finish provides added durability and a rugged appearance
• Increased fluid capacity enhances cooling efficiency during heavy-duty and towing applications

Construction & Design

The aFe Street Series differential cover is precision-crafted from high-quality die-cast A380 aluminum, chosen for its excellent strength-to-weight ratio and resistance to corrosion. This material ensures the cover withstands harsh environments while adding minimal weight. The integrated machined fins maximize surface area, allowing heat to dissipate quickly and effectively, which helps prevent differential fluid from overheating under demanding conditions.

Attention to detail is evident in the fully machined sealing groove that accepts the supplied O-ring, creating a secure, leak-free barrier against contaminants. The inclusion of a large neodymium magnetic drain plug further protects your differential by attracting and holding metal debris that could otherwise cause premature wear or damage to internal components.

Installation & Fitment

Installation of the aFe Street Series Rear Differential Cover is straightforward and designed to be hassle-free. It bolts directly onto the factory AAM 10.5-14 bolt pattern of 2003–2005 Dodge Ram 2500 and Ram 3500 models without requiring any modifications. All necessary hardware is included, allowing for a quick and secure upgrade that enhances your vehicle’s rear differential protection and cooling capabilities.

What's Included

• aFe Street Series Rear Differential Cover
• Neodymium magnetic drain plug
• 1/8" NPT calibration plug preset to factory fluid level
• O-ring for leak-free sealing
• Installation hardware

Ideal For

This differential cover is ideal for Dodge Ram 2500 and Ram 3500 owners who frequently tow heavy loads, drive in hot climates, or engage in off-road activities where axle protection and cooling are critical. It is perfect for enthusiasts seeking a durable upgrade that combines enhanced performance with rugged reliability, ensuring their drivetrain remains protected and cool under demanding conditions.