National 710429 Drive Axle Shaft Seal - Front Left or Rear

Drive Axle Shaft Seal for Rear and Front Left Applications

National 710429 is a drive axle shaft seal built for specific rear and front left differential applications. It uses a fluoro-elastomer sealing material and a bi-directional lip design to help maintain a consistent seal at the axle shaft interface.

With confirmed coverage for Ford Explorer, Ford Escape, Ford Fusion, Lincoln MKX, and related vehicles, this seal is a direct-fit service part for many rear independent suspension and front left axle configurations.

Key Features

• Part number: 710429
• Drive axle shaft seal / oil seal design
• Fluoro-elastomer material for sealing durability
• Bi-directional lip design
• Inside diameter: 1.380 in. / 35.050 mm
• Outside diameter: 2.291 in. / 58.240 mm
• Housing bore: 2.288 in. / 58.190 mm
• Thickness: 0.750 in. / 19.050 mm
• Flanged outside diameter: 2.638 in. / 67.000 mm

Detailed Description

National 710429 is engineered as a drive axle shaft seal for driveline and axle sealing service. The seal’s fluoro-elastomer construction is selected for demanding undercar conditions, while the bi-directional lip design supports sealing at the axle shaft interface in either rotational direction. National has focused on sealing solutions for more than 75 years, and this part reflects that experience in a compact OE-style replacement format.

This seal is used in rear applications on vehicles such as the 2011-2018 Ford Explorer, 2008-2018 Ford Taurus, 2007-2012 Ford Fusion, 2007-2012 Lincoln MKX, and 2017-2020 Lincoln Continental. It also covers front left applications on models including the 1995-2003 Ford Explorer, 2001-2005 Ford Explorer Sport Trac, 2002-2010 Ford Explorer, and 1997-2001 Mercury Mountaineer. This part cross-references Dorman - HELP 46065 for the same application.

What This Seal Helps Address

• Gear oil seepage at the axle shaft seal area
• Contamination entering the differential housing
• Fluid loss from worn or hardened sealing surfaces
• Noise or driveline concerns related to low lubricant level
• Service replacement for leaking rear or front left axle seals

Installation Notes and Tips

Verify shaft diameter, housing bore, and application position before installation. Confirm whether the vehicle uses a rear independent suspension or a front left differential pinion race setup, since fitment varies by axle and ring gear configuration. Clean the sealing surface thoroughly and inspect the axle shaft for wear, grooves, or corrosion that could affect seal life. National 710429 is listed for specific Ford, Lincoln, Mazda, and Mercury applications, including Ford Ranger, Ford Escape, and Mazda Tribute configurations.

Quality Assurance

National is a long-established sealing brand with more than 75 years of experience in sealing technology. The 710429 seal is built to match the dimensional requirements listed for the confirmed applications and is designed for service use in driveline and axle sealing systems.