A-Premium 10.25" Rear Differential Cover for Ford 12-Bolt Axles — Pre-Cut Gasket & Internal Magnet

This heavy-duty replacement rear differential cover from A-Premium is engineered to restore sealing and debris control for Ford applications that use the 10.25 inch ring gear and a 12-bolt pattern. It ships with a pre-cut gasket and an internal magnet to help collect metal particles, but note that differential bolts are not included. Verify ring gear size and bolt count before ordering to ensure fitment.

Which vehicles and axle setups does this cover fit?

This cover is manufactured for different Ford models and years that use the 10.25" ring gear and 12 bolt holes. The fitment spans many Super Duty, F-series, E-series and select Lincoln trucks, but compatibility depends on axle assembly and options such as single or dual rear wheels.

• Fits Ford F-250 and F-350 Super Duty models across multiple years including 1985–2020 ranges where a 10.25" ring gear and 12-bolt pattern are present.
• Includes compatibility with E-350/Econoline Club Wagon and Excursion models listed for 2000–2005 and earlier model ranges shown in specification notes.
• Also compatible with Lincoln Mark LT 2006–2008 where the axle matches 10.25" and 12 bolts.
• Important: not compatible with 9.75" or 8.8" ring gears or housings with 10 bolts.

How does the included gasket and magnet help during service and use?

The supplied gasket is cut to match the cover flange so it simplifies resealing the differential during installation. The internal magnet captures fine ferrous particles suspended in the gear oil, helping you keep debris out of the oil circulation between maintenance intervals.

• Pre-cut gasket included for a straightforward seal, reducing potential leaks when installed correctly.
• Built-in magnet retains metallic debris, making fluid inspections and changes cleaner and safer.
• Design reduces the need for immediate gasket fabrication or extra sealant when the mating surface is clean.

What should I know about hardware, installation, and preparation?

The cover ships without mounting bolts, so you’ll need to reuse your original fasteners or purchase replacement bolts of the correct size and grade. Prepare the axle housing by cleaning the flange surface thoroughly, and check that the bolt holes and seal surfaces are undamaged before installation.

• Bolts are not included—retain original fasteners or buy correct replacement bolts separately.
• Clean the flange and remove old gasket material for a reliable seal; torque bolts to manufacturer specs.
• Verify drain/fill procedures for your vehicle and ensure proper gear oil type and level after installation.

Why confirm ring gear size and bolt count before ordering?

Axle assemblies vary by year, trim and optional equipment; the 10.25" cover is engineered only for the 10.25" ring gear with 12 mounting holes. Installing a mismatched cover can prevent proper sealing and alignment, and may not line up with internal components.

• Check ring gear diameter (10.25") and that your housing uses a 12-bolt pattern before buying.
• Cross-reference part numbers listed (697-704, E5TZ-4033A, 111105) to confirm compatibility with your axle.
• If unsure, inspect the existing cover or consult vehicle service documentation for axle specifications.

Who is this for: This A-Premium rear differential cover is aimed at DIY mechanics, professional technicians and fleet owners replacing worn or leaking covers on compatible Ford and Lincoln axles. If you need a direct-fit 10.25" cover with a gasket and magnetic contaminant control for a 12-bolt rear housing, and you can supply or reuse the mounting bolts, this part is a practical replacement option.