Hummer H1 Front and Rear Differential Cover, 12 Bolts
PML Part Number 11155
Includes bolts, fill plug and magnetic drain plug.
No image available of a polish part.
Approximately one week from order date of polish finish part until part ships.
|Black powder coat finish
Volume: approximately 0.5 quarts over stock
Dimensions: approximately 11.7 tall x 11.8 wide x 3.8 deep
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:
H1 differential covers are similar to a standard Dana Spicer AMC Model 20 cover (PML part number 5048). The cover bolt pattern, shape, and fill hole do not match. We've also heard that this is a Torsen differential.
PML Differential Cover Compared to Stock
These images show this PML differential cover compared to the stock cover.
2003 Hummer H1
Jason H1 Rescue in Texas installed front and rear differential covers on Jeff's 2003 Hummer H1 with a Duramax swap.
The front does not have a skid plate or protective cage covering it. The hardest part of the installation was getting the PML cover passed the winch control box.
With stock rotors (11") there was 1/4 to 1/2 inch clearance, no problem. A little tighter, but fine. The brakes have been changed over to an Alpha with 12 inch rotors. This provided a bit more clearance with the fitment of the PML covers.
On Jeff's H1, stock capacity was 2 quarts. With the PML covers, the capacity increased to 2.6 quarts per differential.
Jeff has seen a temperature drop of 10 degrees with the PML differential covers.
2000 Hummer H1
This 2000 Hummer H1 with a Duramax engine has an aftermarket brake kit so the brakes were larger than stock. To remove the stock cover and install the PML cover, one caliper was loosened, the PML cover slid on, then the caliper was retighted. No modifications needed.
1996 Hummer H1
Jose's Auto Service, 310-672-4253, installed this PML differential cover on the front and rear of a 1996 Hummer H1. Our thanks to Jose for all the pictures and choosing PML covers.
1989 Humvee M998
Louis installed this cover on the front and rear differentials of his 1989 Humvee M998 6.2L Diesel. He emailed us that the covers fit well on front and back without any modifications and he likes the extra oil capacity.
1989 Humvee M998 Diesel
Humvee stock cover and PML cover
1989 Humvee rear differential with PML cover installed
1989 Humvee front differential with PML cover installed
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PML Differential Cover Features:
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