Product Description
Upgrade the rear axle durability and cooling performance of your truck with the WEHRLI CUSTOM FAB WCF100113 11.5IN AAM REAR DIFFERENTIAL COVER. Designed for both Duramax and Cummins diesel trucks equipped with the heavy-duty AAM 11.5 rear axle, this precision-machined differential cover provides superior strength, improved fluid capacity, and increased cooling performance compared to the factory stamped steel cover.
Manufactured from high-quality aluminum and engineered by Wehrli Custom Fabrication, this differential cover is built to handle high torque diesel applications including towing, racing, and high horsepower street builds. The finned design increases heat dissipation while the integrated drain and fill ports simplify fluid service.
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Key Features
- Fits AAM 11.5 rear axles used in Duramax and Cummins trucks
- Heavy-duty aluminum construction for increased strength
- Finned design improves heat dissipation and oil cooling
- Increased fluid capacity for improved lubrication
- Integrated fill and drain ports for easier maintenance
- Precision machined sealing surface
- Direct bolt-on installation using factory hardware locations
Fitment
- 2001-2019 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax with AAM 11.5 axle
- 2001-2019 GMC Sierra 2500HD / 3500HD 6.6L Duramax with AAM 11.5 axle
- 2003-2019 Dodge Ram 2500 / 3500 5.9L or 6.7L Cummins with AAM 11.5 axle
Note: Confirm that your truck is equipped with the 11.5-inch American Axle Manufacturing (AAM) rear differential before ordering. Some trucks may use alternative axle sizes depending on model year and configuration.
Frequently Asked Questions
What axle does this differential cover fit?
This cover is designed specifically for the AAM 11.5 rear axle used in many Duramax and Cummins trucks.
Does this cover increase fluid capacity?
Yes. The deeper design increases fluid capacity which helps improve lubrication and heat control under heavy load.
Is installation difficult?
No. This cover installs using the factory bolt pattern and includes integrated service ports for easier fluid changes.
Does the cover include a gasket?
Most installations use RTV sealant similar to factory installation. Always verify included hardware when ordering.
Why upgrade the factory differential cover?
Aftermarket aluminum covers improve structural strength, cooling efficiency, and maintenance accessibility compared to thin factory stamped covers.
Specifications for WEHRLI CUSTOM FAB WCF100113
| Specification | Details |
|---|---|
| Brand | Wehrli Custom Fabrication |
| Part Number | WCF100113 |
| UPC | Not Listed by Manufacturer |
| GTIN | Not Listed |
| Shipping Weight | Approx. 10 lbs |
| Package Dimensions | 16 x 14 x 6 inches |
| Shipping Method | UPS / FedEx Ground |
| Prop 65 Warning | This product may contain chemicals known to the State of California to cause cancer or reproductive harm. For more information visit https://www.P65Warnings.ca.gov |
