National 394A Wheel Bearing Race - Rear or Rear Inner

National 394A Wheel Bearing Race Overview

The National 394A wheel bearing race is engineered for reliable performance in heavy-duty Chevrolet and GMC vehicles. Designed specifically for models like the C3500, P30, P3500, V30, and V3500, this taper bearing cup ensures precise fitment and durability in driveline and axle assemblies.

• Cup bore diameter: 4.3307 inches (110.00 mm)
• Cup length: 0.7411 inches (18.824 mm)
• Cup radius: 0.0460 inches (1.168 mm)
• Part type: Taper bearing cup
• Compatible with Chevrolet and GMC heavy-duty truck models

Detailed Product Description

The National 394A wheel bearing race is a critical component in the driveline and axle system, designed to house the bearing securely and maintain proper alignment. With a cup bore diameter of 4.3307 inches (110 mm) and a cup length of 0.7411 inches (18.824 mm), this taper bearing cup provides a precise fit for the wheel bearings used in Chevrolet C3500, P30, P3500, V30, and V3500 models. The cup radius of 0.0460 inches (1.168 mm) ensures smooth rotation and reduces wear on the bearing surfaces, contributing to the longevity of the axle assembly.

Applications and Problem Solving

• Replaces worn or damaged wheel bearing races in Chevrolet and GMC heavy-duty trucks
• Addresses wheel bearing noise caused by improper fit or wear
• Prevents premature bearing failure due to misalignment or surface damage
• Restores proper driveline function and vehicle stability
• Supports safe and efficient wheel rotation under heavy load conditions

Installation Notes and Tips

Ensure the wheel hub and spindle surfaces are clean and free of debris before installing the National 394A wheel bearing race. Use appropriate tools to press the taper bearing cup evenly into the hub bore to avoid damage. Verify the cup bore dimensions match the vehicle specifications for Chevrolet C3500, P30, P3500, V30, and V3500 models to ensure proper fitment. Follow manufacturer torque specifications when reassembling the wheel bearing components.

Quality Assurance

National manufactures the 394A wheel bearing race to meet OEM standards for durability and precision. This part undergoes strict quality control to ensure consistent dimensions and material integrity. While no specific warranty information is provided, National parts are known for their adherence to industry standards, supporting reliable performance in heavy-duty applications.