FAG SS2978 Wheel Seal - Front

FAG SS2978 Wheel Seal for Front Wheel End Service

FAG SS2978 is a front wheel seal built for vehicle-specific wheel end applications where contamination control and grease retention matter. It is engineered with a metal shell, auxiliary lip, and nitrile sealing material to help protect bearing components in demanding driveline and axle service.

Key Features

• Part number: SS2978
• Wheel seal for front applications and front inner positions listed in fitment
• Metal seal design with auxiliary lip for added sealing support
• Nitrile sealing material
• Bore diameter: 2.578 in. (65.481 mm)
• Seal outside diameter: 2.582 in. (65.583 mm)
• Seal width: 1.938 in. (49.225 mm)
• Built to help keep dirt, dust, and moisture out of the wheel end
• Helps retain grease over bearing service life

Detailed Description

FAG SS2978 is a wheel seal designed around the demands of OE-style wheel end sealing. The metal-and-auxiliary-lip construction, paired with nitrile sealing material, is intended to maintain a tight seal at the wheel hub while resisting contamination from road debris and moisture. With a 2.578-inch bore diameter, 2.582-inch outside diameter, and 1.938-inch width, this seal is specified for applications that require precise dimensional match-up. This part cross-references National 9150S for the same application. It is a direct service option for many Ford Ranger, Ford Explorer, and Mazda B-series front wheel applications, as well as select classic Ford, Lincoln, and Mercury front positions.

What It Helps Address

• Grease loss at the wheel end
• Contamination from dirt, dust, and moisture
• Premature bearing wear caused by seal failure
• Noise or roughness related to compromised wheel end sealing
• Service issues on front wheel hub and bearing assemblies

Installation Notes and Tips

Verify seal dimensions and position before installation. This part is listed for front and front inner applications, so confirm the exact wheel end location on the vehicle. Clean the hub bore and sealing surface thoroughly, and inspect the bearing, spindle, and hub for wear or scoring before pressing in the new seal. Confirm fitment for your specific Ford Ranger, Ford Explorer, Mazda B2300, or Mazda B4000 application using the vehicle year and position shown in the fitment data.

Quality Assurance

FAG wheel seals are engineered using high-quality materials and built to meet vehicle manufacturer specifications. The seal design is developed to support reliable wheel end protection in applications such as Ford Ranger and Ford Explorer front service, with fitment coverage extending across multiple Ford, Mazda, Lincoln, and Mercury models. Part number SS2978 is specified for demanding wheel seal applications where accurate sealing dimensions are critical.