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Ford Sterling 9¾" Ring Gear, 12 Bolt, Patterned Fins Differential Cover

Part Number 9594

PML makes two covers for this differential. Read About PML Ford 9 3/4 Covers.

PML Ford 9¾ Diff Cover, as-cast PML Ford 9¾ Diff Cover, black powder coat PML Ford 9¾ Diff Cover, polished
As-cast finish
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Black powder coating
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Polished finish
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Volume: 0.5 qt. over stock

Dimensions: Click here for dimensions.

The PML cover for Ford trucks and SUVs has a patterned fin design and a low clearance. It adds capacity to help lower the differential fluid temperature. Thick walls and gasket flanges add strength to the differential housing and provide a uniform clamping force on the gasket surface for a secure seal.

See PML part number 7092 for a straight fin design.


This rear end differential cover fits many Ford trucks and SUVs. Some common applications for this 12 bolt Ford 9¾ differential are:

  • F150, 4.6, 5.0 or 5.4 engine, 2003 to 2017 (some 2015 and newer models have new Super 8.8 10 bolt cover)
  • F150, 1997-2003, 5.4 engine (other engine sizes from 1997-2003, please see PML Ford 8.8 diff cover)
  • Navigator, 1995-2006 can use this cover or the Ford 8.8 diff cover so check before ordering
  • Expedition, 1997-2002, 5.4 engine (check carefully for clearance)

Configurations vary. Always check the vehicle to verify the differential and clearance for a larger cover. Some vehicles may have a 10 bolt, Ford 8.8 or Ford Super 8.8 .

Note to Lightning owners: Ford Lightning 1999-2004 have a sway bar very close to the stock cover. Several Lightning owners have told us our covers will not fit because of that. Check your truck carefully for clearance.

Drain, Fill, Level Check, Temperature Sending Unit

These PML differential covers have a drain hole on the bottom and include 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 differential cover can be machined for a temperature sending unit. PML has machine shop and charges $45 per hole.

PML Differential Cover Compared to Stock

PML Differential Cover Part Number 9594 height compared to stock  PML Differential Cover Part Number 9594, compared to stock
Click on image to view larger.

These images show this PML differential cover compared to the stock cover.

This image compares the depth of both PML Ford Sterling 9 3/4" differential covers and the stock cover. Click on image to view larger in a new tab or window.
PML Ford F-150 Differential Covers depth comparisons

Installation on 2016 Ford Transit

Mitch installed this PML differential cover on his 2016 Ford Transit 3.7 6 speed. With the spare tire pulled back slightly, he had 3/4 inch clearance between the tire and the PML cover.

2016 Ford Transit2016 Ford Transit Van   PML cover on 2016 Ford TransitPML Ford 9.75 12 bolt rear cover on 2016 Transit
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Installation on 2013 Ford F–150

Mark in Lousiana installed this PML differential cover on his 2013 Ford F150 FX4 5.0.

2013 F150 FX4 5.0 2013 F150   PML Ford 12 bolt differential cover on 2013 F150 PML cover on 2013 F150
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Video of Installation on an F–150

Motorz TV made a video of an Ford F-150 gear swap and included the installation of this PML differential cover. To watch the video, click here.

For a larger picture, please click one of the above images. A separate window will open showing a bigger picture. (The larger pictures take a minute to display.)

PML Differential Cover Features:

  • Increased oil capacity for cooler temperatures
  • Sand-cast aluminum with raised fins
  • 3/16-inch thick wall construction to add strength to differential housing
  • 3/8-inch thick gasket flange will not bend when bolts are tightened
  • Machined gasket surface for a secure seal using RTV or factory reusable gasket
  • Oil changes without removing the cover
  • All hardware provided, including magnetic drain plug

Learn more about finishes and construction of PML parts.