Wehrli Rear Differential Cover

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

WCF100113-GRY

Overview:

The Wehrli Grey Rear Differential Cover is a premium fabricated aluminum upgrade designed specifically for Dodge Ram 2500 and 3500 trucks from 2003 to 2018 equipped with the AAM 11.5-inch rear axle. Engineered to provide superior protection and enhanced durability, this custom differential cover is ideal for truck owners who demand reliability and toughness from their drivetrain components. Its robust construction safeguards the differential housing from impacts and harsh off-road conditions, while also improving fluid capacity and heat dissipation.

Perfect for enthusiasts running heavy-duty applications such as towing, hauling, or off-road adventures, the Wehrli cover offers peace of mind by reinforcing one of the most critical components of your truck’s rear axle assembly.

Key Features:

This differential cover combines thoughtful engineering with high-quality materials to deliver lasting performance and protection. Key features include:

• Precision-fabricated from lightweight yet strong aluminum for enhanced durability
• Custom fit for the AAM 11.5-inch rear axle found in Dodge Ram 2500/3500 (2003–2018)
• Two-stage grey powder coat finish for superior corrosion resistance and rugged appearance
• Includes stainless steel hardware to prevent rust and ensure long-term reliability
• Integrated magnetic drain plug for easy fluid changes and to capture metal debris
• Increased fluid capacity to improve cooling and extend differential component life
• Designed to resist deformation and protect the differential from rocks, debris, and trail hazards
• Compatible with heavy-duty diesel engines such as Cummins and Duramax setups

Construction & Design:

The Wehrli rear differential cover is expertly crafted from high-grade aluminum, chosen for its excellent strength-to-weight ratio and corrosion resistance. The cover’s design features reinforced ribs and a thick wall construction to withstand impacts and prevent warping under extreme conditions. The custom two-stage powder coating process not only enhances the cover’s durability against rust and abrasion but also provides a sleek grey finish that complements the rugged aesthetic of Dodge Ram trucks.

Stainless steel fasteners are included to ensure secure mounting and resist corrosion over time, making this cover a long-lasting upgrade for your truck’s rear differential.

Installation & Fitment:

Installation of the Wehrli Grey Rear Differential Cover is straightforward and designed to be a direct bolt-on replacement for the factory cover on Dodge Ram 2500 and 3500 models from 2003 through 2018 with the AAM 11.5 rear axle. No modifications to the axle housing or differential components are required. The included stainless steel hardware and magnetic drain plug simplify maintenance and fluid changes.

This cover fits a wide range of Dodge Ram trims, including Laramie, SLT, Sport, ST, SXT, TRX, and TRX4, ensuring broad compatibility for most heavy-duty Ram trucks within the specified years.

What's Included:

• One Wehrli fabricated aluminum rear differential cover with grey powder coat finish
• Stainless steel mounting hardware kit
• Magnetic drain plug installed
• Installation instructions

Ideal For:

This differential cover is ideal for Dodge Ram owners who:

• Require enhanced protection for their rear differential during off-road use or heavy towing
• Operate trucks equipped with Cummins or Duramax diesel engines demanding robust drivetrain components
• Want to increase differential fluid capacity and improve heat dissipation for extended component life
• Seek a durable, corrosion-resistant upgrade with a clean, professional appearance
• Prefer a direct-fit, no-modification installation solution for their AAM 11.5 rear axle

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.