National 9178S Wheel Seal - Rear Inner

Overview of National 9178S Wheel Seal for Chevrolet Corvette

The National 9178S wheel seal is designed specifically for Chevrolet Corvette models, providing reliable sealing performance in driveline and axle applications. Constructed from durable nitrile material, this oil seal ensures effective protection against contaminants and fluid leaks.

• Inside diameter: 1.687 inches (42.85 mm)
• Outside diameter: 2.609 inches (66.27 mm)
• Housing bore: 2.605 inches (66.17 mm)
• Width: 0.235 inches (5.97 mm)
• Material: Nitrile rubber for resistance to oil and wear
• Type: 4s oil seal from the 9000 series

Detailed Product Description

The National 9178S wheel seal is engineered to fit the shaft and housing dimensions of select Chevrolet Corvette driveline components. With an inside diameter of 1.687 inches and an outside diameter of 2.609 inches, this seal fits precisely to prevent oil leakage and contamination ingress. The nitrile construction offers excellent resistance to heat, oil, and abrasion, making it suitable for demanding automotive environments. The 4s type design provides a secure sealing lip arrangement to maintain optimal performance over time.

Applications and Problem Solving

This wheel seal is used primarily in the driveline and axle assemblies of Chevrolet Corvette vehicles. It addresses common issues such as:

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

Installation Notes and Tips

When installing the National 9178S wheel seal, ensure the shaft and housing surfaces 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 to maintain proper sealing function. Lubricate the seal lip lightly with compatible oil before installation to reduce initial wear.

Quality Assurance and Warranty

Manufactured by National, a recognized brand in automotive sealing solutions, the 9178S wheel seal meets industry standards for durability and performance. The nitrile material and precise dimensions ensure consistent sealing under typical operating conditions. Warranty coverage details should be confirmed with the product documentation or supplier.