National 370054A Wheel Seal - Front Inner

National 370054A Wheel Seal Overview

The National 370054A wheel seal is an oil bath seal built for driveline and axle sealing applications where consistent lubricant retention matters. It uses nitrile material and a Redi-Coat surface to support installation and sealing performance in the hub area.

National has spent more than 75 years developing sealing solutions, and this wheel seal reflects that focus with dimensions and materials suited to demanding axle service. It is a direct-fit style option for applications that require a 2.875-inch shaft diameter, a 4.181-inch outside diameter, and a 4.175-inch housing bore.

Key Features

• Part number: 370054A
• Wheel seal / oil bath seal for driveline and axle sealing systems
• Nitrile construction for sealing durability
• Redi-Coat surface treatment
• Outside diameter: 4.181 in. (106.200 mm)
• Housing bore: 4.175 in. (106.050 mm)
• Shaft diameter: 2.875 in. (73.030 mm)
• Width: 0.822 in. (20.880 mm)
• Installation tool reference: RD271

Detailed Description

National 370054A is a wheel seal designed around precise dimensional requirements for oil bath hub assemblies. The nitrile sealing material is selected for use in sealing environments where lubricant control and contamination resistance are important, while the Redi-Coat finish supports a cleaner sealing interface during installation. This part number, 370054A, is part of National’s 370000 series and is specified with a 4.181-inch outside diameter and 4.175-inch housing bore for accurate fitment.

For buyers searching for a wheel seal for axle service, hub sealing, or oil bath seal replacement, National 370054A provides the dimensional detail needed to match the application. It is also referenced across related aftermarket listings for the same application, including Monroe Shocks & Struts 172286 and 182286. National 370054A is a practical choice when the vehicle calls for this exact seal size and style.

What It Helps Address

• Gear oil or lubricant leakage at the wheel end
• Contamination entering the hub or axle sealing area
• Wear-related seal replacement during axle service
• Improper sealing from a damaged or hardened wheel seal
• Service needs on oil bath hub assemblies

Installation Notes and Tips

Verify the housing bore, shaft diameter, and seal width before installation to confirm the seal matches the hub assembly. Use the specified installation tool RD271 when required for proper seating and to reduce the risk of seal damage during installation. Clean the sealing surfaces thoroughly and inspect the shaft and bore for wear, scoring, or corrosion before installing the new seal.

For vehicle-specific searches, this part is commonly sought for wheel seal replacement on Ford truck and axle applications, including Ford F-150 and Ford F-250 style service needs where the listed dimensions match the original seal. Always confirm the exact seal dimensions against the removed part before assembly.

Quality Assurance

National is a long-established sealing brand with more than 75 years of experience in sealing technology. The 370054A wheel seal is built to the listed dimensional specifications and material requirements for the intended oil bath seal application.