National RA-311 Axle Differential Bearing and Seal Kit - Front or Rear

Axle Differential Bearing and Seal Kit for Ford Applications

The National RA-311 axle differential bearing and seal kit provides the core components needed for differential service on a wide range of Ford, Lincoln, Mercury, and Mazda rear and front axle applications. It is built for vehicles using 8.8-inch or 8.5-inch ring gear configurations, depending on the listed fitment.

• National axle differential bearing and seal kit
• For rear and select front axle service applications
• Fits Ford F-150, Mustang, Explorer, Ranger, Expedition, and more
• Supports 8.8-inch ring gear applications and select 8.5-inch ring gear applications
• Cross-references Timken DRK311 for the same application

Fitment and Application Details

Compatible With a broad range of Ford rear axle service needs, including Fits 2009-2015 Ford F-150, rear; Fits 2005-2014 Ford Mustang, rear; and Fits 2001-2011 Ford Ranger, rear. The RA-311 also covers select front axle applications such as Fits 2001-2002 Ford Expedition, front and Fits 2001-2002 Lincoln Navigator, front with independent front suspension.

This part number, RA-311, also applies to older Ford truck and car platforms including Ford Bronco, E-150 Econoline, Crown Victoria, Town Car, Grand Marquis, and Mazda B4000 models listed in the fitment data.

What This Kit Helps Address

• Worn differential bearings that create noise or rough operation
• Leaking axle seals that leave gear oil around the housing
• Service needs after differential teardown or gear inspection
• Restoration work on Ford 8.8-inch and select 8.5-inch axle assemblies
• Repair on rear axle and select front axle applications listed for RA-311

Installation Notes and Tips

Verify axle type, ring gear size, and position before ordering. This kit is listed for rear applications on most vehicles and select front applications with independent front suspension or Visteon/Ford axle configurations. Confirm the exact year, make, model, and axle notes against the fitment table before installation. RA-311 is commonly used during differential bearing and seal service where the axle assembly is already disassembled.

Quality Assurance

National states that this bearing and seal kit includes the components required to complete the repair. The part also cross-references Timken DRK311 and other listed interchange numbers for the same application.