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SKU: WCF100114-RED / UPC: WCF100114-RED
Wehrli Custom Fabrication RED Rear Differential Cover 2020-2024 GM Duramax & 2019-2023 Ram HD
The Wehrli Custom Fabrication RED Rear Differential Cover, engineered to outperform all other aftermarket options. Designed specifically for 2020-2024 GM Duramax HD Trucks (2500/3500) and 2019-2023 Dodge Ram 2500/3500 HD with AAM 12" rear axles, this premium differential cover is the top choice for diesel enthusiasts seeking unmatched quality, protection, and aesthetics. Crafted with precision in the USA, the WCF100114-RED delivers superior heat dissipation, increased fluid capacity, and robust construction to withstand the toughest conditions, making it the best investment for your truck’s drivetrain.
Why Wehrli?
Durability:
Constructed from high-strength, precision-laser-cut, CNC-bent, and TIG-welded aluminum, this differential cover offers exceptional resistance to impacts, making it ideal for off-roading, towing, and high-performance applications. Unlike OEM covers or inferior aftermarket options, it protects your differential from rocks, debris, and trail hazards.
Heat Dissipation:
The fabricated aluminum design promotes efficient cooling, reducing gear oil temperatures during heavy-duty use. This extends the life of your differential components compared to stock or cast covers.
Fluid Capacity:
Adds approximately 1-2 quarts of additional fluid capacity over stock, ensuring better lubrication and cooling for your AAM 12" rear axle. Be prepared to add up to 10 pints of fluid for optimal performance.
Gloss Grey Finish:
Coated with Wehrli’s signature grey powder coat, this cover resists corrosion and adds a striking, custom look to your truck’s undercarriage. The premium finish outshines competitors’ offerings in both style and longevity.
Fitment:
CAD-designed for a seamless, bolt-on installation, replacing OEM covers without modification.
Replaces GM Part Numbers: 12471445, 20984339, 23445891
MOPAR Part Numbers: 5086904AD, 5086904AB, 5086904AC.
Made in the USA: Backed by Wehrli Custom Fabrication’s reputation for craftsmanship, every is built with pride in Sandwich, Illinois, ensuring top-tier quality and customer support.
Included:
- 1 x Fabricated Aluminum Differential Cover: Precision-crafted for AAM 12" rear axles, finished in gloss black powder coat (SKU: WCF100114-RED).
- 1 x 1" Fill Port with 5/8" Allen Plug: Simplifies fluid checks and refills, ensuring easy maintenance.
- Stainless Steel Installation Hardware: Includes high-strength socket head cap screws and washers for secure mounting (optional upgrade to ARP 12-point stainless steel fasteners available separately, Part #WCF100217).
- Drain Plug: Facilitates quick and clean fluid changes, enhancing serviceability over stock designs.
Fitment:
The Wehrli WCF100114-RED Rear Differential Cover is compatible with the following vehicles equipped with AAM 12" rear axles:
- GM Duramax HD Trucks:
- 2020-2024 Chevrolet Silverado 2500HD/3500HD (6.6L L5P Duramax)
- 2020-2024 GMC Sierra 2500HD/3500HD (6.6L L5P Duramax)
- Dodge Ram HD Trucks:
- 2019-2023 Ram 2500/3500 (6.7L Cummins Diesel)
Fitment Note: Verify your vehicle’s axle type (AAM 12" rear axle). Not compatible with AAM 11.5" axles (use WCF100113 for those models). Contact Wehrli or your retailer to confirm fitment for specific trims, build dates, or aftermarket modifications.
Installation & Maintenance
Bolt-On Installation: No drilling or modifications required. Installs in under an hour with basic hand tools.
Fluid Recommendation: Use high-quality gear oil (e.g., 75W-90 or 75W-140 synthetic). Expect to use 8-10 pints due to increased capacity.
Maintenance: Check fluid levels regularly via the 1" fill port. The included drain plug simplifies fluid changes, reducing downtime.
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