National 354A Wheel Bearing Race - Rear Outer

National 354A Taper Bearing Cup

The National 354A wheel bearing race is a taper bearing cup built from premium-grade steel for dependable bearing support in driveline and axle applications. Its crowned raceway helps distribute load more evenly, which is important for smooth operation in demanding rear axle and transmission-related service.

Key Features

• Premium-grade steel construction for bearing cup durability
• Crowned raceway for more even load distribution
• Cup bore: 3.3464 in. (84.9990 mm)
• Cup length: 0.6875 in. (17.4630 mm)
• Cup radius: 0.0460 in. (1.1680 mm)
• Part description: taper bearing cup
• National part number 354A for direct catalog lookup

Detailed Description

National 354A is a taper bearing cup used in wheel bearing and related driveline service where a precise race surface is required. The crowned raceway is engineered to help spread bearing load across the contact area, supporting consistent operation under load. This makes the National 354A a practical choice for service work on applications such as Ford Mustang and Dodge truck fitments listed below, including 2001-2010 Ford Mustang and 1980-1996 Ford Mustang with Tremec 3550 transmission, plus rear outer applications on 1975-1976 Dodge B300, D300, and W300 with Spicer 60 axle and 12 in. x 2.5 in. brakes.

This part cross-references Schaeffler 354-A for the same application.

What It Helps Address

• Noise caused by a worn or pitted bearing race
• Uneven bearing contact from damaged raceway surfaces
• Excessive play related to race wear in the hub or axle assembly
• Service issues during wheel bearing replacement or axle rebuilds
• Fitment-specific repair needs on Ford Mustang and Dodge rear axle applications

Installation Notes and Tips

Inspect the bearing cone, hub, and spindle or axle surfaces before installation. Press the cup into place using proper bearing service tools to avoid damaging the raceway. Confirm the application details, including year range, position, and any notes such as Tremec 3550 transmission or Spicer 60 axle requirements, before ordering. For fitment reference, this part fits 2001-2010 Ford Mustang, N/A; fits 1980-1996 Ford Mustang, N/A with Tremec 3550 Transmission; fits 1975-1976 Dodge B300, Rear Outer with 12 in. x 2.5 in. Brakes and Spicer 60 Axle; fits 1975-1976 Dodge D300, Rear Outer with 12 in. x 2.5 in. Brakes and Spicer 60 Axle; fits 1975-1976 Dodge W300, Rear Outer with 12 in. x 2.5 in. Brakes and Spicer 60 Axle.

Quality Assurance

National manufactures this taper bearing cup with premium-grade steel and a crowned raceway profile to support even load distribution in service. The National 354A is cataloged for confirmed vehicle applications and is identified by a widely used OE and aftermarket cross-reference structure for easier parts matching.