National 6408 Wheel Bearing - Rear

National 6408 Wheel Bearing Overview

The National 6408 wheel bearing is engineered for reliable driveline performance in a wide range of vehicles including Buick, Chevrolet, Ford, and Dodge models. Designed as a cylindrical bearing assembly, this part ensures smooth wheel rotation and durability under demanding conditions.

• Non-separable cylindrical inner race for consistent fitment
• Outer race width of 0.825 inches (21.0 mm) for secure installation
• Outside diameter measures 2.531 inches (64.287 mm) for precise compatibility
• Bore size approximately 1.62 inches (41.1 mm) to fit specific axle shafts
• Overall width near 0.86 inches (21.9 mm) for proper wheel hub alignment

Technical Specifications and Design Details

The National 6408 wheel bearing features a non-separable cylindrical inner race, which simplifies installation and maintenance. The bore dimensions range from 1.619 to 1.622 inches (41.123 to 41.198 mm), ensuring a tight fit on compatible axle shafts. The outer race width is 0.825 inches (21.0 mm), while the overall width is approximately 0.86 inches (21.9 mm), providing the necessary clearance and support within the wheel hub assembly. The outside diameter of 2.531 inches (64.287 mm) matches OEM specifications for a variety of vehicles, maintaining proper wheel alignment and rotational stability.

Compatible Vehicles and Applications

This wheel bearing is compatible with numerous makes and models, including but not limited to Buick, Cadillac, Chevrolet, Chrysler, Dodge, Ford, GMC, Isuzu, Jeep, Lincoln, Mazda, Mercury, Mitsubishi, Oldsmobile, Plymouth, Pontiac, and Ram. It fits models such as the Chevrolet Blazer, Ford F-150, Dodge Ram 1500, Jeep Cherokee, and Buick Century, among others. The National 6408 is suitable for applications requiring a cylindrical bearing assembly with the specified bore and diameter dimensions.

Common Issues Addressed by National 6408 Wheel Bearing

• Eliminates wheel hub noise caused by worn or damaged bearings
• Prevents wheel wobble and vibration during vehicle operation
• Reduces uneven tire wear linked to faulty bearing performance
• Restores smooth wheel rotation for improved driveline efficiency
• Helps maintain proper wheel alignment and vehicle handling

Installation Notes and Tips

When installing the National 6408 wheel bearing, ensure the hub and spindle surfaces are clean and free of debris. Use appropriate tools to press the bearing into place without damaging the races. Verify the bore size matches the axle shaft to avoid fitment issues. It is recommended to inspect related components such as seals and hubs during installation to ensure overall driveline integrity.

Quality Assurance and Warranty

National wheel bearings are manufactured to meet or exceed OEM standards for durability and performance. The 6408 part number undergoes rigorous quality control to ensure consistent dimensions and material strength. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in product reliability.