National 7994S Wheel Seal - Front Inner

Overview of National 7994S Wheel Seal for Ford Mustang and Mercury Villager

The National 7994S wheel seal is engineered to provide reliable sealing performance for driveline and axle applications. Designed specifically for Ford Mustang and Mercury Villager models, this oil seal helps maintain proper lubrication and prevent contamination in wheel hubs.

• Inside diameter: 1.562 inches (39.670 mm)
• Outside diameter: 2.066 inches (52.480 mm)
• Housing bore: 2.062 inches (52.370 mm)
• Width: 0.200 inches (5.080 mm)
• Material: durable nitrile rubber
• Series: 7000
• Type: 44 oil seal

Detailed Product Description and Specifications

The National 7994S wheel seal is constructed from nitrile, a material known for its resistance to oil, heat, and wear, making it suitable for demanding automotive environments. With an inside diameter of 1.562 inches and an outside diameter of 2.066 inches, this seal fits precisely within the housing bore of 2.062 inches, ensuring a tight and secure fit. The 0.200-inch width provides adequate sealing surface to prevent oil leakage and contamination ingress. This part belongs to National's 7000 series, which is designed for reliable sealing in driveline and axle assemblies. The Type 44 designation indicates a specific lip design optimized for oil retention and dust exclusion.

Compatible Vehicles and Applications

This wheel seal is compatible with select Ford and Mercury vehicles, specifically the Ford Mustang and Mercury Villager models. It is intended for use in wheel hubs and axle assemblies where maintaining oil integrity is critical for component longevity and performance.

• Prevents oil leaks in wheel hubs
• Protects bearings from dirt and debris
• Maintains lubrication within axle assemblies
• Reduces risk of premature wear on driveline components
• Helps avoid costly repairs due to seal failure

Installation Notes and Tips

When installing the National 7994S wheel seal, ensure the sealing surface and housing bore are clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the sealing lip. Lubricate the seal lip lightly with clean oil before installation to reduce initial wear. Verify the seal is seated flush and properly aligned to avoid leaks.

Quality Assurance and Warranty Information

National wheel seals are manufactured to meet industry standards for durability and performance. The 7994S part number undergoes rigorous quality control to ensure consistent dimensions and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects to support long-term reliability in Ford Mustang and Mercury Villager applications.