National 02420 Differential Pinion Race - Front, Front Inner, Rear Inner or Rear Outer

Overview of National 02420 Differential Pinion Race

The National 02420 differential pinion race is a precision-engineered taper bearing cup designed for driveline and axle applications. This part is compatible with various Chevrolet, GMC, Isuzu, and Mercedes-Benz models, including the Chevrolet Blazer, GMC Jimmy, Isuzu Trooper, and Mercedes-Benz 190E series.

• Cup Bore Diameter: 2.6875 inches (68.263 mm)
• Cup Length: 0.6875 inches (17.463 mm)
• Cup Radius: 0.0620 inches (1.575 mm)
• Part Type: Taper bearing cup for differential pinion race
• Part Number: 02420

Technical Specifications and Features

The National 02420 differential pinion race features a cup bore diameter of 2.6875 inches (68.263 mm), ensuring a precise fit within the differential assembly. The cup length measures 0.6875 inches (17.463 mm), providing adequate surface area for bearing support. The cup radius of 0.0620 inches (1.575 mm) is designed to accommodate the taper bearing geometry, promoting smooth rotation and load distribution. This part is manufactured to meet OEM standards for durability and dimensional accuracy.

Compatible Vehicles and Applications

This differential pinion race is compatible with a range of vehicles, including Chevrolet Blazer, GMC Jimmy, K10 and K20 Suburban, Isuzu Trooper, LUV, Pickup, and Mercedes-Benz 190E, 260E, 300E, and 300SL models. The part number 02420 is specifically suited for these models’ driveline and axle assemblies, ensuring proper fit and function.

Common Issues Addressed by the National 02420

• Wear or damage to the existing differential pinion race causing noise or vibration
• Improper bearing fit leading to premature bearing failure
• Excessive play or looseness in the differential pinion assembly
• Corrosion or pitting on the bearing cup surface
• Replacement during axle or differential rebuilds

Installation Notes and Tips

• Ensure the differential housing is clean and free of debris before installation
• Use proper tools to press the pinion race evenly into the bore to avoid distortion
• Verify the cup bore and length dimensions match the vehicle specifications
• Apply appropriate lubrication to the bearing surfaces during assembly
• Check for correct preload and bearing alignment after installation

Quality Assurance and Warranty

National manufactures the 02420 differential pinion race to meet strict quality standards, ensuring reliable performance in demanding driveline applications. While specific warranty details may vary, National parts typically come with a limited warranty covering defects in material and workmanship. Always consult the product documentation or manufacturer for exact warranty terms.