aFe Pro Series Rear Diff Cover

2021–2022 Ram 1500 6.2L TRX

Part #: 46-71280B

Overview

The aFe Pro Series Rear Differential Cover is a high-performance upgrade designed specifically for the 2021–2022 Ram 1500 6.2L TRX equipped with Dana M250 rear axles. Engineered to enhance durability and cooling, this rear diff cover offers increased oil capacity and superior protection for your vehicle’s differential. Ideal for enthusiasts who demand reliability and improved thermal management during off-road adventures or heavy-duty driving, it ensures your differential stays cooler and better protected under extreme conditions.

With its sleek black powder coat finish and machined fins, this cover not only performs exceptionally but also adds a rugged, aggressive look to your Ram TRX’s rear end.

Key Features

The aFe Pro Series Rear Diff Cover combines advanced engineering with practical features to maximize gear protection and ease of maintenance:

• Constructed from durable cast aluminum for long-lasting strength and corrosion resistance
• Black powder coat finish with machined fins for enhanced heat dissipation and a premium appearance
• Increased oil capacity compared to stock covers, allowing for better lubrication and extended performance
• Built-in internal and external fins transfer heat efficiently from the oil to the surrounding air
• Dual neodymium magnetic plugs (drain and fill) capture metal particles to protect gears from wear
• Oil level sight glass enables quick and easy inspection of differential fluid levels without removal
• Calibration plug prevents overfilling, simplifying service and ensuring optimal fluid volume
• Reuses factory gasket for a reliable seal and straightforward installation
• Includes all necessary mounting hardware for a hassle-free upgrade

Construction & Design

Crafted from premium cast aluminum, the aFe Pro Series Rear Diff Cover offers exceptional durability while minimizing added weight. The black powder coat finish provides corrosion resistance and a sleek look that complements the aggressive styling of the Ram 1500 TRX. Machined fins are integrated both internally and externally to maximize heat transfer, helping to maintain optimal operating temperatures for the differential fluid. This thoughtful design reduces the risk of overheating and extends the life of your differential components.

Installation & Fitment

Designed as a direct fit replacement for the Dana M250 rear axle on 2021–2022 Ram 1500 6.2L TRX models, this differential cover installs easily using the included mounting hardware. It reuses the factory gasket, eliminating the need for additional sealants or modifications. Installation can be completed with basic hand tools, making it accessible for both professional mechanics and experienced DIY enthusiasts. The included calibration plug ensures proper fluid level without guesswork, streamlining maintenance.

What's Included

• aFe Pro Series Rear Differential Cover (Black with Machined Fins)
• Dual neodymium magnetic drain and fill plugs
• Calibration plug to prevent overfilling
• Oil level sight glass
• All necessary mounting hardware
• Factory gasket reuse instructions

Ideal For

This rear differential cover is perfect for Ram 1500 TRX owners who want to improve the durability and cooling efficiency of their rear axle under demanding conditions. Whether you frequently tow, haul heavy loads, or enjoy off-road driving, the aFe Pro Series cover provides enhanced protection and peace of mind. It is also an excellent choice for enthusiasts seeking a high-quality, visually striking upgrade that complements the aggressive styling of the TRX.

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.