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The Hummer H1 Front and Rear Differential Cover by is a premium upgrade designed to deliver serious protection and performance for one of the toughest 4WD platforms ever built. Engineered specifically for the Hummer H1, these differential covers are built from high-strength materials to withstand harsh off-road conditions, impacts, and extreme environments. With increased oil capacity and integrated cooling fins, they help regulate differential temperatures under load—whether you’re crawling off-road, towing, or driving in demanding terrain. For owners looking to enhance durability and reliability, upgrading your differential cover is a practical step toward long-term drivetrain protection.
In addition to strength and cooling benefits, the Hummer H1 Front and Rear Differential Cover by YourCovers is designed with usability in mind. Features such as magnetic drain plugs make maintenance easier by capturing metal particles, while precision-engineered sealing surfaces help prevent leaks and ensure consistent performance. For enthusiasts restoring or modifying a Hummer H1, this upgrade not only improves function but also adds a high-quality finish to the drivetrain.
Volume: approximately 0.5 quarts over stock
Dimensions: approximately 11.7 tall x 11.8 wide x 3.8 deep
This differential cover has been installed on many Hummer H1 as well as M998 Humvee (HMMWV) vehicles.
On Hummer H1 the front and rear differentials are the same. This PML cover will fit both axles and works with standard undercarriage protection. It is designed to slide between the brake calipers.
On an H1 with an aftermarket brake kit with larger calipers, one of the calipers had to be loosened to remove the stock covers and install this PML differential cover. After installation, the caliper was retighted. No modifications were needed. We do not know which brake kit so there may be variations.
Always check your vehicle to verify configuration and clearance before ordering.
PML designed this differential cover with:
