aFe Street Series Rear Diff Cover

2021–2022 Ram 1500 6.2L TRX

Part #: 46-71280A

Overview

The aFe Street Series Rear Differential Cover is a high-quality upgrade designed specifically for the 2021–2022 Ram 1500 6.2L TRX equipped with Dana M250 rear axles. Crafted to enhance durability and cooling efficiency, this rear diff cover offers increased oil capacity and superior gear protection. Ideal for enthusiasts seeking improved axle performance and longevity, it combines robust construction with smart engineering features to keep your differential running cooler and cleaner under demanding conditions.

With its raw cast aluminum finish and machined fins, this cover not only provides functional benefits but also adds a rugged, performance-oriented aesthetic to your vehicle’s rear axle assembly.

Key Features

The aFe Street Series Rear Diff Cover integrates several advanced features to optimize your Ram TRX’s rear differential performance:

• Durable cast aluminum construction with a raw finish and precision-machined cooling fins
• Increased oil capacity compared to the factory cover for enhanced lubrication and heat dissipation
• Built-in internal and external fins that efficiently transfer heat from the differential oil to the outside air
• Neodymium magnetic drain plug designed to capture metal particles and debris, protecting gears from wear
• Calibration plug positioned to prevent overfilling, simplifying maintenance and ensuring proper fluid levels
• Reuses the factory gasket for a secure, leak-free seal
• Includes all necessary mounting hardware for straightforward installation
• Optional PRO Series deep-reach magnetic fill plug available for enhanced magnetic filtration

Construction & Design

The cover is precision cast from high-grade aluminum, chosen for its excellent strength-to-weight ratio and thermal conductivity. The raw finish provides a durable surface that can be customized with paint or coatings if desired. Machined fins on both the interior and exterior surfaces maximize surface area, promoting efficient heat transfer away from the differential fluid. This design helps maintain optimal operating temperatures, reducing the risk of overheating during heavy-duty or off-road use.

The inclusion of a neodymium magnetic drain plug is a thoughtful engineering touch, capturing metal shavings and contaminants before they can circulate through the gears, thereby extending the life of your differential components.

Installation & Fitment

Installation is straightforward and designed to be a direct replacement for the factory rear differential cover on Ram 1500 6.2L TRX models from 2021 to 2022 with Dana M250 rear axles. The cover reuses the factory gasket, and all necessary mounting hardware is included, allowing for a hassle-free upgrade without the need for modifications. The included calibration plug ensures accurate fluid fill levels, eliminating guesswork during servicing.

What's Included

• aFe Street Series Rear Differential Cover (Raw Finish with Machined Fins)
• Neodymium magnetic drain plug
• Calibration plug to prevent overfilling
• All required mounting hardware

Ideal For

This rear differential cover is ideal for Ram 1500 TRX owners who demand enhanced durability and cooling for their rear axle, especially those who frequently tow, haul, or drive aggressively off-road. It suits enthusiasts looking to extend the service life of their differential components while maintaining factory-level fitment and ease of maintenance.

Emissions Note

This product does not require a CARB Executive Order (EO) number and is compliant with emissions regulations for the specified vehicle applications.

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.