Ford 10.25" & 10.5" 12-Bolt Fiber Differential Cover Gasket

• Fiber differential cover gasket for Ford 10.25" and 10.5" 12-bolt rear axle housings

• One gasket fits both Ford 10.25" and 10.5" axles — same 12-bolt cover pattern

• Fiber construction compresses evenly against the cover sealing rail to prevent gear oil leaks

• Sold individually; no hardware, cover, or drain plug included

This is a fiber differential cover gasket sized and punched for Ford 10.25" and 10.5" 12-bolt rear axle housings — two heavy-duty Ford rear ends that share the same 12-bolt cover pattern, allowing one gasket to serve both axle sizes. This makes it a common service gasket across a wide range of Ford heavy-duty truck and SUV applications including F-150, F-250, F-350 Super Duty, Bronco, and Excursion builds.

It's a direct replacement for a leaking, damaged, or missing cover gasket on compatible Ford 10.25" and 10.5" axle applications, providing a reliable fiber seal between the differential cover and the axle housing sealing rail during cover reinstallation, fluid changes, or cover upgrades.

This gasket is sold individually and includes no hardware, cover, or drain plug. Confirm your axle model and cover bolt pattern before ordering, and clean the cover and housing sealing surfaces thoroughly before installation for a proper seal.

Fiber Gasket Cut for the Ford 10.25" and 10.5" 12-Bolt Cover Pattern
This fiber differential cover gasket is punched to match the shared 12-bolt cover pattern of Ford 10.25" and 10.5" rear axle housings, giving you a clean, leak-resistant seal between the differential cover and the axle housing sealing rail during cover reinstallation or replacement.

One Gasket, Two Axle Sizes — Stops Leaks on F-Series and Excursion Builds
A worn, crushed, or damaged cover gasket is one of the most common causes of gear oil seepage at the rear axle. Because the Ford 10.25" and 10.5" share the same 12-bolt cover bolt pattern, this single fiber gasket covers both axle sizes — usable with or without RTV compound depending on your preference and the cover's sealing surface condition.

What axles does this gasket fit?
This differential cover gasket is designed for Ford 10.25-inch and 10.5-inch 12-bolt rear axle housings. Both axle sizes use the same 12-bolt cover pattern, allowing this gasket to fit either application.

Will this fit a Ford F-150?
Yes. The Ford 10.25-inch rear axle was used in select Ford F-150 models. Verify your specific axle before ordering.

Will this fit a Ford F-250 or F-350 Super Duty?
Yes. The Ford 10.5-inch rear axle was commonly used in Ford F-250 and F-350 Super Duty trucks. Confirm your specific axle before purchasing.

Will this fit a Ford Bronco or Excursion?
Yes. Many Ford Broncos were equipped with the 10.25-inch rear axle, while many Ford Excursions used the 10.5-inch rear axle. Verify your axle before ordering.

Will this fit a GM or Chrysler rear axle?
No. This gasket is designed specifically for Ford 10.25-inch and 10.5-inch 12-bolt differential cover applications and is not compatible with GM or Chrysler axle assemblies.

Do I need to use RTV with this gasket?
Fiber gaskets can be installed with or without RTV sealant, depending on the condition of the sealing surfaces and your preferred installation method. Always clean both mating surfaces thoroughly before installation.

What's included with this gasket?
This listing includes the fiber differential cover gasket only. Differential cover, mounting hardware, and drain plug are not included.

When would I need to replace my differential cover gasket?
A new gasket is recommended whenever the differential cover is removed for gear oil changes, inspections, repairs, or differential cover replacement to help prevent leaks.

Does this gasket work with aftermarket differential covers?
Yes, provided the aftermarket cover is designed for the Ford 10.25-inch or 10.5-inch 12-bolt axle and uses the factory sealing surface and bolt pattern.

How do I ensure a proper seal with this gasket?
Thoroughly clean the differential housing and cover sealing surfaces, remove all old gasket material and sealant, position the gasket correctly, and tighten the cover bolts evenly to the manufacturer's specifications.