National 710281 Differential Pinion Seal - Front Outer

National 710281 Differential Pinion Seal Overview

The National 710281 differential pinion seal is engineered to provide reliable sealing performance for Chevrolet and GMC trucks and SUVs. Designed specifically for models like the Chevrolet Blazer, K1500, K2500, Tahoe, and Yukon, this seal helps maintain optimal driveline function by preventing oil leaks and contamination.

• Inside diameter: 1.940 inches (49.280 mm)
• Outside diameter: 2.905 inches (73.910 mm)
• Flanged outside diameter: 3.100 inches (78.750 mm)
• Thickness: 0.400 inches (10.160 mm)
• Material: Durable nitrile rubber with Redicoat coating
• Housing bore diameter: 2.900 inches (73.660 mm)
• Part type: Oil seal for differential pinion shaft

Technical Details and Material Specifications

This differential pinion seal from National is constructed from nitrile, a material known for its resistance to oil, heat, and wear. The Redicoat feature enhances the seal’s durability and corrosion resistance, extending service life in demanding driveline environments. The precise dimensions, including a 1.940-inch inside diameter and a 2.905-inch outside diameter, ensure a secure fit within the differential housing bore of 2.900 inches, compatible with the specified Chevrolet and GMC models.

Compatible Vehicles and Applications

The National 710281 differential pinion seal is compatible with a range of Chevrolet and GMC vehicles, including:

• Chevrolet Blazer
• Chevrolet K1500 and K1500 Suburban
• Chevrolet K2500 and K2500 Suburban
• Chevrolet K3500
• Chevrolet Tahoe
• GMC Yukon

This seal is designed to maintain the integrity of the differential pinion shaft, preventing oil leaks and protecting internal components from dirt and debris.

Common Issues Addressed by the National 710281 Seal

• Prevents oil leaks from the differential pinion shaft
• Reduces contamination of differential fluid by dirt and moisture
• Minimizes wear on the pinion shaft and bearings
• Helps maintain proper lubrication within the differential assembly
• Prevents driveline noise caused by fluid loss or contamination

Installation Notes and Tips

When installing the National 710281 differential pinion seal, ensure the differential housing bore is clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the nitrile material or Redicoat surface. Verify the seal’s orientation matches the original part to maintain proper sealing function. It is recommended to inspect the pinion shaft and bearings for wear during installation and replace if necessary.

Quality Assurance and Warranty

National manufactures the 710281 differential pinion seal to meet industry standards for durability and performance. The use of nitrile material combined with Redicoat treatment provides enhanced resistance to oil and corrosion. This part is backed by National’s quality assurance processes, ensuring reliable fitment and function for Chevrolet and GMC driveline applications. Warranty coverage details should be confirmed with the original equipment manufacturer or distributor.