National M804010 Differential Pinion Race - Front or Rear Inner

National M804010 Differential Pinion Race Overview

The National M804010 differential pinion race is a precision-engineered taper bearing cup designed for driveline and axle applications. This part is compatible with a wide range of vehicles including Chevrolet Silverado 1500, Dodge Ram 2500, and GMC Sierra 3500, ensuring reliable performance in demanding conditions.

• Cup Bore Diameter: 3.5000 inches (88.9 mm)
• Cup Length: 0.7500 inches (19.05 mm)
• Cup Radius: 0.1250 inches (3.175 mm)
• Part Type: Taper bearing cup
• Part Number: M804010

Technical Specifications and Features

The National M804010 differential pinion race features a cup bore of 3.5 inches (88.9 mm), providing a precise fit for compatible pinion bearings. The cup length of 0.75 inches (19.05 mm) and a cup radius of 0.125 inches (3.175 mm) are designed to meet OEM specifications for durability and performance. This taper bearing cup is engineered to maintain proper bearing alignment and reduce wear in the differential assembly.

Compatible Vehicles and Applications

This differential pinion race is compatible with various makes and models, including Buick, Cadillac, Chevrolet, Chrysler, Dodge, GMC, Mitsubishi, Oldsmobile, Plymouth, Pontiac, and Ram. Notable compatible models include Chevrolet Silverado 1500, GMC Sierra 2500 HD, Dodge Ram 3500, Pontiac GTO, and Buick LeSabre. The part number M804010 is specifically designed to fit these vehicles’ driveline and axle assemblies, ensuring proper fit and function.

Common Issues Addressed by the M804010 Differential Pinion Race

• Excessive bearing wear causing noise or vibration in the differential
• Improper bearing alignment leading to premature failure
• Damage to the pinion bearing seat from corrosion or impact
• Leaking or degraded bearing surfaces affecting driveline performance
• Replacement during differential rebuilds or axle repairs

Installation Notes and Tips

When installing the National M804010 differential pinion race, ensure the bearing cup bore and pinion shaft are clean and free of debris. Use proper tools to press the cup evenly into the differential housing to avoid distortion. Verify the cup length and radius match OEM specifications to maintain correct bearing preload and alignment. It is recommended to inspect related components such as bearings and seals during installation for optimal performance.

Quality Assurance and Warranty

National manufactures the M804010 differential pinion race to meet or exceed OEM standards for durability and fitment. This part undergoes rigorous quality control to ensure consistent performance in demanding automotive applications. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in the product’s reliability.