National 8976S Wheel Seal - Front Inner

Overview of National 8976S Wheel Seal

The National 8976S wheel seal is engineered to provide reliable sealing performance for driveline and axle applications. Designed with precision, this oil seal helps maintain proper lubrication and prevent contamination in compatible vehicle models.

• Inside diameter: 3.125 inches (79.38 mm)
• Outside diameter: 4.179 inches (106.15 mm)
• Housing bore diameter: 4.173 inches (106 mm)
• Width: 0.290 inches (7.37 mm)
• Material: durable nitrile rubber for resistance to oil and wear
• Series: 8000, Type 49 oil seal

Detailed Product Description

The National 8976S wheel seal is part of the 8000 series, designed specifically for axle and driveline sealing systems. Constructed from nitrile material, it offers excellent resistance to petroleum-based oils and greases, ensuring long-lasting performance. The seal features an inside diameter of 3.125 inches (79.38 mm) to fit shafts precisely, while the outside diameter of 4.179 inches (106.15 mm) matches the housing bore diameter of 4.173 inches (106 mm) for a secure fit. With a width of 0.290 inches (7.37 mm), this oil seal maintains a tight barrier to prevent lubricant leakage and keep contaminants out.

Applications and Problem Solving

This wheel seal is compatible with various vehicle makes and models requiring a 3.125-inch shaft seal, commonly found in automotive driveline and axle assemblies. It addresses several common issues including:

• Preventing oil leaks from axle shafts
• Protecting bearings from dirt and moisture intrusion
• Maintaining proper lubrication within the axle housing
• Reducing wear caused by contaminants
• Ensuring consistent driveline performance

Installation Notes and Tips

When installing the National 8976S wheel seal, ensure the shaft and housing bore are clean and free of debris. Use appropriate tools to press the seal evenly into the housing bore without damaging the sealing lip. Verify the seal orientation matches the original part, with the sealing lip facing the lubricant side. Lubricate the seal lip lightly before installation to reduce initial wear and facilitate proper seating.

Quality Assurance and Warranty

National wheel seals are manufactured to meet industry standards for durability and performance. The 8976S part number undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects to support reliable service life in automotive applications.