aFe Pro Series Rear Differential Cover

2019–2020 Ram 2500 / 3500

Part #: 46-71150B

Overview

The aFe Pro Series Rear Differential Cover is a high-performance upgrade designed specifically for 2019 to 2020 Ram 2500 and 3500 trucks equipped with AAM 11.5, 11.8, or 12.0 axles. This premium replacement cover enhances the durability and cooling efficiency of your rear differential, providing superior protection under heavy-duty conditions such as towing, hauling, and off-road driving. By increasing oil capacity and improving heat dissipation, it helps maintain optimal gear lubrication and extends the life of your differential components.

Built for truck owners who demand reliability and longevity from their drivetrain, the aFe Pro Series cover combines rugged construction with advanced thermal management features to keep your Ram’s rear differential running cooler and cleaner in challenging environments.

Key Features

Engineered for enhanced protection and cooling, the aFe Pro Series Rear Differential Cover offers the following benefits:

• Durable cast aluminum construction with a black powder coat finish for corrosion resistance and long-lasting durability
• Precision-machined cooling fins cast directly into the cover to increase surface area and improve heat dissipation
• Increased oil capacity compared to the factory cover, enhancing lubrication and thermal management
• Dual neodymium magnetic drain plugs that capture metal particles, reducing wear and extending gear life
• Large oil level sight glass for quick, accurate fluid level checks without removing the cover or plugs
• Calibration plug set to factory oil level to prevent overfilling and ensure proper fluid volume
• Precision fitment designed specifically for AAM 11.5, 11.8, and 12.0 axles found in Ram 2500 and 3500 trucks

Construction & Design

The aFe Pro Series Rear Differential Cover is crafted from high-quality cast aluminum, chosen for its excellent strength-to-weight ratio and superior thermal conductivity. The black powder coat finish not only delivers a sleek, durable appearance but also protects the cover from corrosion and environmental damage. Integrated machined cooling fins are cast directly into the aluminum body, significantly increasing the surface area to dissipate heat more efficiently than the stock cover.

Attention to detail is evident in the inclusion of dual neodymium magnetic drain plugs, strategically positioned to capture metal debris circulating in the gear oil. This feature helps prevent premature wear of internal components. Additionally, the large sight glass is engineered for durability and ease of use, allowing for quick visual inspection of fluid levels without the need to remove the cover or plugs.

Installation & Fitment

Installation of the aFe Pro Series Rear Differential Cover is straightforward and designed as a direct bolt-on replacement for the factory cover on 2019–2020 Ram 2500 and 3500 trucks with AAM 11.5, 11.8, or 12.0 axles. No modifications or special tools are required, making it accessible for both professional mechanics and experienced DIY enthusiasts. The included calibration plug ensures the correct oil level is maintained, preventing overfilling and potential damage to the differential.

What's Included

• aFe Pro Series Rear Differential Cover with machined cooling fins
• Dual neodymium magnetic drain plugs
• Large oil level sight glass
• Calibration plug set to factory oil level
• Installation hardware

Ideal For

This rear differential cover is ideal for Ram 2500 and 3500 owners who require enhanced durability and improved cooling for their rear differential. It is especially suited for those who frequently tow heavy loads, engage in off-road driving, or operate their trucks in high-temperature environments where differential overheating is a concern. The aFe Pro Series cover helps maintain optimal gear oil temperature and cleanliness, contributing to longer differential service life and improved vehicle reliability.