National 722108 Axle Spindle Seal - Front Inner or Front Outer

Axle Spindle Seal for Front Outer Applications

National 722108 is an axle spindle seal built for front outer service on a wide range of Jeep, Ford, Dodge, Chevrolet, GMC, and Mazda applications. It uses nitrile material and precise sealing dimensions to help maintain a clean, protected spindle area in driveline assemblies.

With coverage for many Spicer axle configurations, this National oil seal is a direct-fit option for vehicles such as Jeep Wrangler, Cherokee, and TJ, along with Ford F-150, F-250, and Bronco applications that use the specified axle and ring gear combinations.

Key Features

• Part number: National 722108
• Axle spindle seal / oil seal for front outer and front inner positions
• Nitrile construction for sealing performance in driveline service
• Housing bore: 1.625 in. (41.280 mm)
• Outside diameter: 1.662 in. (42.210 mm)
• Shaft diameter: 1.312 in. (33.320 mm)
• Width: 0.156 in. (3.960 mm)
• VRS1 type, Series 722000

Detailed Description

National 722108 is engineered as a replacement axle spindle seal for vehicles using the listed Spicer axle assemblies and ring gear sizes. The seal dimensions are designed around a 1.625-inch housing bore and 1.312-inch shaft, helping support a proper fit in the spindle area where axle lubrication and contamination control are critical. National has focused on sealing solutions for more than 75 years, and this part reflects that experience in a practical OE-style replacement format.

This part cross-references SKF 711818 for the same application. It is a strong match for fitment searches involving Jeep Wrangler front outer axle spindle seal, Ford F-250 front outer seal, and Jeep Cherokee front outer oil seal applications.

Common Problems This Seal Helps Address

• Gear oil leakage at the front spindle area
• Contamination entering the axle assembly
• Worn or hardened original seal material
• Service issues after axle or hub maintenance
• Seal replacement needs on Spicer 30-AF, 44, and related axle setups

Installation Notes and Tips

Verify axle type, ring gear size, and position before ordering. This seal is listed for front outer and front inner applications depending on the vehicle and axle configuration, so match the exact fitment row for your Jeep, Ford, Dodge, Chevrolet, GMC, or Mazda model. Inspect the spindle, housing bore, and shaft surface for wear or scoring before installation to help the new seal seat correctly.

Quality Assurance

National is a long-established sealing brand known for premium sealing solutions and ongoing product development for modern vehicle service needs. National 722108 is built to the published dimensions and material specification for the listed applications.