aFe Pro Series Front Differential Cover

2013–2018 Ram 2500 / 3500 6.7L Diesel

Part #: 46-70402

Overview

The aFe Pro Series Front Differential Cover with Machined Fins is a high-quality upgrade designed specifically for Ram 2500 and 3500 trucks equipped with the 6.7L diesel engine and AAM 9.25-12 bolt front axles. This premium differential cover replaces the factory stamped steel cover with a robust die-cast aluminum alternative that enhances durability and cooling performance. By increasing fluid capacity and improving heat dissipation, it helps extend the life of your front differential components, making it an essential upgrade for heavy-duty use, off-road adventures, and towing applications.

Built to withstand demanding conditions, the aFe Pro Series cover offers superior protection against overheating and premature wear, ensuring your drivetrain remains reliable even under extreme stress. Its functional design combines rugged construction with practical features that simplify maintenance and improve overall differential performance.

Key Features

This Pro Series front differential cover incorporates advanced engineering to maximize protection, cooling, and ease of service:

• Constructed from durable die-cast A380 aluminum for exceptional strength and longevity
• Machined cooling fins cast directly into the cover to enhance heat dissipation and reduce operating temperatures
• Wrinkle black powder-coated finish provides corrosion resistance and a sleek, rugged appearance
• Dual neodymium magnetic drain plugs capture metal particles to protect internal gears from wear
• Large oil level sight glass with factory-calibrated plug prevents overfilling and allows quick fluid checks
• 1/8" NPT port included for optional temperature sensor installation to monitor differential heat
• Reinforced ribs integrated into the casting add structural rigidity for off-road durability
• Increases fluid capacity by 3 to 4 quarts without requiring dipstick modifications

Construction & Design

The aFe Pro Series differential cover is precision die-cast from premium A380 aluminum, known for its excellent strength-to-weight ratio and thermal conductivity. The integrated machined fins increase surface area to efficiently dissipate heat generated during heavy-duty operation. Reinforced ribs within the casting provide added structural integrity to resist impacts and stresses common in off-road and towing scenarios.

Its wrinkle black powder-coated finish not only protects against corrosion but also resists chipping and fading, maintaining a durable and attractive look over time. The inclusion of dual magnetic drain plugs helps trap metallic debris before it can circulate through the differential, reducing internal wear and extending component life. The large sight glass simplifies routine maintenance by allowing quick visual confirmation of fluid levels without removing the cover.

Installation & Fitment

Designed as a direct replacement for the stock stamped steel front differential cover on AAM 9.25-12 bolt front axles, this aFe Pro Series cover installs easily using existing mounting points with no modifications required to the axle housing or differential. The increased fluid capacity is accommodated without the need for dipstick changes, making the upgrade straightforward and hassle-free. Installation hardware is included for convenience; however, a gasket, spin-on filter, and pickup screen must be sourced separately.

What's Included

• Pro Series Front Differential Cover with machined cooling fins
• Dual neodymium magnetic drain plugs
• Temperature sensor port plug (1/8" NPT)
• Calibration plug for oil level sight glass
• Installation hardware

Ideal For

This differential cover is ideal for Ram 2500 and 3500 owners who demand enhanced reliability and longevity from their front differential. It is especially suited for off-road enthusiasts, heavy-duty truck users, and those who frequently tow or operate in high-temperature environments. By improving cooling efficiency and increasing fluid capacity, it helps prevent overheating and premature component failure, ensuring your drivetrain performs reliably under the toughest conditions.