Wehrli 11.5in AAM Rear Differential Cover — Gloss Black for 2001-2019 Chevy Duramax & 2003-2019 Dodge Cummins
Protect and upgrade your rear differential with the Wehrli Custom Fabrication 11.5-inch AAM Rear Differential Cover in Gloss Black. Designed for the AAM 11.5-inch rear axle found in 2001-2019 Chevrolet Duramax and 2003-2019 Dodge Cummins trucks, this heavy-duty cover provides significantly better differential fluid capacity and heat dissipation compared to the factory stamped steel unit. Built from thick-wall cast and fabricated steel with Wehrli's signature gloss black powdercoat finish, this cover is as tough as it looks.
Key Features
- Fits the 11.5in AAM rear differential — used in Duramax and Cummins trucks
- Increased fluid capacity for improved lubrication and thermal management
- Thick-wall construction for added differential housing protection
- Gloss black powdercoat finish — durable and easy to clean
- Includes drain plug for easier fluid changes
- Bolt-on installation using factory mounting holes
Built Tough for Diesel Trucks
The factory AAM diff cover is a thin stamped steel unit with minimal fluid capacity. Wehrli's upgrade cover adds meaningful fluid volume to keep your differential running cooler under towing, hauling, and performance driving conditions, while the thick walls provide added protection against trail debris and impacts.
Fitment: 2001-2019 Chevrolet Duramax (11.5in AAM axle) | 2003-2019 Dodge Cummins (11.5in AAM axle)
Part Number: WCF100113-GB
Brand: Wehrli Custom Fabrication (WCFab)