Wehrli Rear Differential Cover

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

WCF100113-BB

Overview:

The Wehrli Rear Differential Cover is a precision-engineered upgrade designed specifically for Dodge Ram 2500 and 3500 models from 2003 to 2018 equipped with the AAM 11.5-inch rear axle. Crafted from fabricated aluminum, this differential cover offers enhanced protection and durability compared to the factory steel covers. It is an ideal choice for truck owners who demand superior strength and reliability for heavy-duty applications, including towing, hauling, and off-road use.

Finished in a striking Bengal Blue custom single-stage powder coat, this cover not only improves the rugged appearance of your truck but also provides excellent corrosion resistance. With stainless steel hardware and a built-in drain plug, maintenance is simplified, making it easier to service your differential fluid and extend the life of your drivetrain components.

Key Features:

Designed to deliver robust protection and long-lasting performance, the Wehrli Rear Differential Cover includes the following key features:

• Fabricated from high-quality 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)
• Bengal Blue single-stage powder coat finish for corrosion resistance and enhanced aesthetics
• Stainless steel hardware included to prevent rust and ensure secure installation
• Integrated drain plug for easy differential fluid changes and maintenance
• Increased fluid capacity to improve cooling and extend differential life
• Precision-engineered to maintain proper gear alignment and axle performance
• Compatible with Duramax and Cummins diesel engines commonly found in these trucks

Construction & Design:

The Wehrli Rear Differential Cover is expertly fabricated from premium-grade aluminum, chosen for its excellent strength-to-weight ratio and resistance to corrosion. This material choice helps reduce overall vehicle weight while providing a robust shield against impacts from rocks, debris, and rough terrain. The cover’s design includes reinforced ribs and a deep sump to increase fluid capacity, which aids in heat dissipation and improves the longevity of your differential components.

The Bengal Blue powder coat finish is applied using a single-stage process that ensures a durable, chip-resistant surface that stands up to harsh environmental conditions. Stainless steel bolts secure the cover tightly to the axle housing, preventing leaks and ensuring a reliable seal under demanding conditions.

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 equipped with the AAM 11.5-inch rear axle from 2003 through 2018. No modifications or special tools are required, making it accessible for both professional mechanics and experienced DIY enthusiasts. The included stainless steel hardware and drain plug simplify the installation and future maintenance tasks.

This cover fits a wide range of Dodge Ram models, including Laramie, SLT, Sport, ST, SXT, TRX, and TRX4 trims, ensuring broad compatibility across popular heavy-duty truck configurations.

What's Included:

• Fabricated aluminum rear differential cover with Bengal Blue powder coat finish
• Stainless steel mounting hardware
• Integrated drain plug with sealing components
• Installation instructions

Ideal For:

This differential cover is perfect for Dodge Ram 2500 and 3500 owners who require enhanced axle protection and improved differential cooling for demanding applications. Whether you use your truck for heavy towing, off-road adventures, or daily driving, the Wehrli Rear Differential Cover offers peace of mind with its durable construction and maintenance-friendly design. It is especially suited for trucks powered by Duramax or Cummins diesel engines that benefit from the added reliability and fluid capacity.

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.