Wehrli Rear Differential Cover

Fits Most Dodge/Ram 6.7L Diesel/5.9L Diesel (03-18)

WCF100113-DG

Overview:

The Wehrli Rear Differential Cover is a precision-engineered upgrade designed specifically for Dodge Ram 2500 and 3500 models from 2003 through 2018. Crafted to fit the robust AAM 11.5-inch rear axle, this cover offers enhanced protection and durability for heavy-duty trucks equipped with Cummins or Duramax engines. Ideal for truck owners who demand reliability and longevity from their drivetrain components, the Wehrli cover safeguards the differential against impacts, debris, and harsh off-road conditions.

Whether you use your Ram for towing, hauling, or off-road adventures, this custom fabricated aluminum cover delivers peace of mind by reinforcing one of the most critical components of your vehicle’s drivetrain. Its durable construction and corrosion-resistant finish ensure lasting performance under the toughest conditions.

Key Features:

Engineered for strength and longevity, the Wehrli Rear Differential Cover includes a range of features that set it apart from standard OEM covers:

• Precision fabricated from high-grade aluminum for superior strength and lightweight durability
• Custom fit for the AAM 11.5-inch rear axle found in Dodge Ram 2500 and 3500 trucks (2003–2018)
• Two-stage Deore Gold powder coating provides excellent corrosion resistance and a sleek finish
• Includes stainless steel hardware for enhanced rust resistance and secure mounting
• Integrated stainless steel drain plug allows for easy fluid changes without removing the cover
• Designed to increase fluid capacity, improving differential cooling and extending gear oil life
• Reinforced ribbing adds structural rigidity to protect against impacts and deformation
• Compatible with heavy-duty applications including towing, off-roading, and commercial use

Construction & Design:

The Wehrli Rear Differential Cover is expertly crafted from high-quality aluminum, chosen for its excellent strength-to-weight ratio and resistance to corrosion. The cover is fabricated using advanced manufacturing techniques to ensure a perfect fit and superior durability compared to stamped steel OEM covers. Its robust design features reinforced ribs that add rigidity, protecting the differential housing from dents and damage caused by rocks, road debris, or trail obstacles.

Finished with a custom two-stage Deore Gold powder coating, the cover not only resists rust and corrosion but also maintains an attractive appearance over time. Stainless steel fasteners and a built-in drain plug complete the design, providing both functional benefits and long-term reliability.

Installation & Fitment:

Installation of the Wehrli Rear Differential Cover is straightforward and designed to be a direct bolt-on replacement for the factory cover on Dodge Ram 2500 and 3500 trucks from 2003 to 2018. No modifications or special tools are required, making it accessible for professional mechanics and experienced DIY enthusiasts alike. The included stainless steel hardware ensures a secure and leak-free seal.

This cover fits models equipped with the AAM 11.5-inch rear axle, commonly found in heavy-duty Dodge Ram trucks with Cummins diesel or Duramax engines, providing a reliable upgrade for enhanced protection and performance.

What's Included:

• One fabricated aluminum rear differential cover
• Stainless steel mounting hardware kit
• Stainless steel integrated drain plug
• Installation instructions

Ideal For:

The Wehrli Rear Differential Cover is perfect for Dodge Ram 2500 and 3500 owners who require enhanced durability and protection for their rear differential. It is especially suited for:

• Heavy-duty towing and hauling applications
• Off-road enthusiasts seeking additional protection against trail hazards
• Truck owners looking to extend the life of their differential fluid through increased capacity and improved cooling
• Those wanting a corrosion-resistant, long-lasting upgrade over factory covers

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.