Wehrli Rear Differential Cover

2003–2018 Dodge Ram 2500 / Ram 3500 with AAM 11.5 Rear Axle

WCF100113-BG

Overview:

The Wehrli Rear Differential Cover is a premium fabricated aluminum upgrade designed specifically for Dodge Ram 2500 and Ram 3500 trucks from 2003 through 2018 equipped with the AAM 11.5-inch rear axle. Engineered to provide superior protection and durability, this cover is ideal for truck owners who demand enhanced strength and reliability from their drivetrain components. Featuring a custom single-stage Bengal Grey powder coat finish, it offers both rugged functionality and a sleek, factory-inspired appearance.

Built to withstand the rigors of heavy-duty use, this differential cover is perfect for enthusiasts running Duramax or Cummins diesel engines, as well as those who frequently tow, haul, or drive off-road. It not only safeguards the rear differential from impacts and debris but also improves heat dissipation to help maintain optimal operating temperatures under demanding conditions.

Key Features:

The Wehrli Rear Differential Cover combines robust construction with thoughtful design elements to enhance your truck’s rear axle performance and longevity. Key features include:

• Precision-fabricated from high-quality aluminum for superior strength and corrosion resistance
• Custom single-stage Bengal Grey powder coating for a durable, attractive finish
• Designed specifically for the AAM 11.5-inch rear axle found in Dodge Ram 2500/3500 (2003–2018)
• Includes stainless steel hardware and a magnetic drain plug for easy maintenance and debris capture
• Enhanced fluid capacity to improve cooling and reduce gear oil temperatures
• Reinforced design to protect the differential housing from rocks, road debris, and off-road hazards
• Direct bolt-on fitment with no modifications required
• Compatible with heavy-duty diesel engines such as Duramax and Cummins

Construction & Design:

Crafted from premium aluminum, the Wehrli Rear Differential Cover offers a lightweight yet exceptionally strong solution compared to standard stamped steel covers. The aluminum construction provides excellent heat dissipation, helping to keep differential fluid cooler during heavy towing or off-road use. The cover’s reinforced ribbing and thick walls add structural integrity, reducing the risk of damage from impacts or rough terrain.

The custom Bengal Grey powder coat finish not only enhances corrosion resistance but also delivers a clean, professional look that complements the rugged styling of Dodge Ram trucks. Stainless steel fasteners ensure long-lasting durability and resistance to rust, while the magnetic drain plug captures metal particles to protect internal gears and bearings.

Installation & Fitment:

Installation of the Wehrli Rear Differential Cover is straightforward and designed to be a direct replacement for the factory cover on Dodge Ram 2500 and 3500 models from 2003 to 2018 with the AAM 11.5 rear axle. No special tools or modifications are necessary, making it an ideal upgrade for DIY enthusiasts and professional installers alike. The included stainless steel hardware ensures a secure, leak-free seal.

This cover is engineered to fit precisely, maintaining proper fluid levels and sealing integrity while providing enhanced protection and cooling performance.

What's Included:

• Fabricated aluminum rear differential cover with Bengal Grey powder coat
• Stainless steel mounting hardware
• Magnetic drain plug
• Installation instructions

Ideal For:

This differential cover is ideal for Dodge Ram 2500 and 3500 owners who require enhanced durability and protection for their rear axle. It is especially suited for:

• Truck owners who tow heavy trailers or haul substantial loads
• Off-road enthusiasts seeking to protect their differential from rocks and debris
• Diesel-powered Ram trucks equipped with Duramax or Cummins engines
• Anyone looking to improve differential fluid cooling and extend component life
• Drivers wanting a high-quality, visually appealing upgrade over the factory cover

Wehrli Custom Fabrication (WCFab) is a diesel performance and metal fabrication specialist building upgraded hard parts and engineered solutions for Duramax, Cummins, and Power Stroke trucks. Known for high-quality fabrication and truck-focused product development, WCFab supports everything from tow rigs to race-oriented diesel builds where durability, airflow, and heat management matter.