Ford Sterling 9.75 12 Bolt Differential Cover – Patterned Fins – Heavy Duty Aluminum Upgrade

Enhance the performance and protection of your drivetrain with this Ford Sterling 9.75 12 Bolt Differential Cover with Patterned Fins, designed to deliver improved cooling and durability under demanding conditions. The patterned fin design increases surface area for enhanced heat dissipation, helping maintain optimal differential temperatures during towing, hauling, and heavy-duty use.

Constructed from high-quality aluminum, this differential cover provides superior strength compared to factory stamped covers while offering added protection for internal components. The unique fin pattern not only improves cooling efficiency but also adds a bold, performance-inspired appearance.

Engineered as a direct-fit replacement for Ford Sterling 9.75 12 bolt differentials, this cover ensures dependable fitment, secure sealing, and long-lasting reliability.

✅ Key Features:

• Fits Ford Sterling 9.75 12 bolt differentials
• Patterned fin design for enhanced heat dissipation
• Heavy-duty aluminum construction for strength and durability
• Provides added protection for internal components
• Ideal for towing, hauling, and heavy-duty applications
• Direct fit for easy installation and leak-free sealing

Upgrade your differential with confidence and enjoy improved cooling, enhanced durability, and long-lasting performance.

Volume: 0.5 quarts over stock

Dimensions: Click here for dimensions. 

Number of Bolts: 12 bolts

This PML cover for Ford F–150 trucks, SUVs and vans has a patterned fins and is extra capacity. This is a heavy duty replacement for the stock 12 bolt cover on Ford Sterling 9.75 (9 3/4) inch differentials.

Benefits:

• Increased fluid capacity
• Only 5/8 inch deeper than stock
• Fins for heat dissipation and a custom look
• Drain hole and magnetic drain plug for easier servicing
• Heavy duty construction to add strength to the differential housing
• Thick gasket flange for a uniform clamping providing a secure seal
• Fill hole and a boss that can optionally be machined for a temperature sending unit
• Hardware included

PML also makes a straight fin cover for this differential for applications wanting a more classic look or a round shaped cover.

Applications:

This rear end differential cover fits many Ford F150s, vans and SUVs with the 12 bolt for 9.75 differential. Some possible applications are:

• F150, 2004 to 2023
• F150, 1997 to 2003, 5.4 engine
• Navigator, 1995 to 2006
• Expedition, 1997 to 2002, 5.4 engine (check carefully for clearance)
• Transit vans

Configurations vary. Always check the vehicle to verify the differential and clearance for a larger cover. Some vehicles may have a Ford 8.8, PML part number 9519, or 8.8 Super, PML part number 11145, differential.

Note to Lightning owners: Ford Lightning 1999 to 2004 have a sway bar very close to the stock cover and there is no space for a larger aftermarket cover. Check your truck carefully for clearance.

Drain, Fill, Level Check, Optional Temperature Sending Unit Machining

This PML differential cover has a drain hole on the bottom and includes a magnetic drain plug.

There is a fill hole on top.

On the vehicles this cover was designed for there is a plug on the driveshaft side of the differential for level check (this can also be used for filling).

A boss on the side of the cover can be machined for a temperature sending unit. Optionally, PML can drill and tap a 1/8 NPT hole. There is a machining charge for this.

PML Differential Cover Compared to Stock

   
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This image compares the depth of both PML Ford Sterling 9.75 differential covers and the stock cover. Click on image to view larger in a new tab or window.