National 710508 Differential Pinion Seal - Rear Outer

National 710508 Differential Pinion Seal Overview

The National 710508 differential pinion seal is engineered to provide reliable sealing performance for heavy-duty trucks and SUVs. Designed specifically for select Chevrolet, Dodge, GMC, and Ram models, this oil seal helps maintain proper lubrication and prevents leaks in the driveline system.

• Inside diameter: 2.324 inches (59.030 mm)
• Outside diameter: 3.546 inches (90.070 mm)
• Thickness: 0.591 inches (15.010 mm)
• Flanged outside diameter: 4.018 inches (102.060 mm)
• Material: Durable fluoro-elastomer for enhanced resistance
• Helix type: Clockwise-spiral lip design for effective sealing
• Compatible with housing bore of 3.541 inches (89.940 mm)

Technical Details and Specifications

This National differential pinion seal (part number 710508) features a fluoro-elastomer construction that offers excellent chemical and temperature resistance, suitable for demanding driveline environments. The seal’s clockwise-spiral lip design ensures a tight fit around the pinion shaft, minimizing oil leakage and contamination ingress. With an overall width of 0.606 inches (15.392 mm) including the side lip, it fits precisely within the housing bore dimensions specified for compatible vehicles.

Compatible Vehicles and Applications

The National 710508 differential pinion seal is compatible with a range of Chevrolet, Dodge, GMC, and Ram trucks and SUVs, including models such as Chevrolet Silverado 2500, 3500, Suburban 2500, GMC Sierra 2500 HD, Yukon XL 2500, Dodge Ram 1500, 2500, 3500, and others. This seal is designed for use in heavy-duty applications where maintaining differential oil integrity is critical.

• Prevents oil leaks in differential pinion shafts
• Protects against dirt and debris contamination
• Maintains proper lubrication for driveline components
• Reduces wear and extends differential service life
• Helps avoid costly repairs due to seal failure

Installation Notes and Tips

When installing the National 710508 differential pinion seal, ensure the housing bore and shaft surfaces are clean and free of debris. Use appropriate tools to press the seal evenly into the bore without damaging the sealing lip. Verify the seal orientation matches the clockwise-spiral lip design for optimal performance. It is recommended to inspect related driveline components during installation for wear or damage.

Quality Assurance and Warranty

National manufactures the 710508 differential pinion seal to meet industry standards for durability and performance. The fluoro-elastomer material and precision design contribute to reliable sealing under heavy-duty conditions. While specific warranty details may vary, National products typically come with a limited warranty against defects in material and workmanship to ensure customer confidence.