National 710506 Differential Pinion Seal - Rear Outer

National 710506 Differential Pinion Seal Overview

The National 710506 differential pinion seal is engineered to provide reliable sealing performance for a range of vehicles including Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade models. Designed with precision, this oil seal helps maintain differential integrity by preventing leaks and contamination.

• Inside diameter: 2.125 inches (53.980 mm)
• Outside diameter: 2.764 inches (70.200 mm)
• Flanged outside diameter: 3.228 inches (82.000 mm)
• Thickness: 0.469 inches (11.900 mm)
• Material: Durable nitrile rubber for resistance to oil and heat
• Helix type: Clockwise-spiral lip design for enhanced sealing
• Compatible with housing bore of 2.756 inches (70.000 mm)

Technical Details and Specifications

The National 710506 differential pinion seal features a nitrile construction that offers excellent resistance to automotive fluids and high temperatures. Its clockwise-spiral lip design ensures a tight seal around the pinion shaft, which measures 2.087 inches (53.000 mm) in diameter. The seal’s overall width with side lip is 0.535 inches (13.600 mm), providing a secure fit within the differential housing bore of 2.756 inches (70.000 mm). This part is part of the 710500 series, known for consistent quality and durability in driveline sealing applications.

Compatible Vehicles and Applications

This differential pinion seal is compatible with a variety of makes and models, including Buick, Cadillac, Chevrolet, GMC, Honda, Hummer, Isuzu, Oldsmobile, and Saab. Specific models include Chevrolet Avalanche 1500, GMC Yukon XL, Cadillac Escalade ESV, and Isuzu Rodeo Sport. The National 710506 is designed to meet the sealing requirements of these vehicles’ driveline and axle systems, ensuring proper differential function and longevity.

Common Issues Addressed by the National 710506 Seal

• Prevents oil leaks from the differential pinion shaft
• Protects differential components from dirt and debris contamination
• Reduces risk of premature wear due to fluid loss
• Maintains proper lubrication within the differential assembly
• Helps avoid costly repairs related to seal failure

Installation Notes and Tips

When installing the National 710506 differential pinion seal, ensure the housing bore is clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the lip. Verify the shaft diameter matches the seal’s inside diameter of 2.125 inches (53.980 mm) for a proper fit. Lubricate the seal lip lightly with differential oil before installation to reduce initial wear. Follow vehicle-specific service manual instructions for torque specifications and installation procedures.

Quality Assurance and Warranty

National manufactures the 710506 differential pinion seal to meet industry standards for durability and performance. Constructed from high-quality nitrile material, this seal is designed to withstand the demanding conditions of automotive driveline systems. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in the product’s reliability.