FAG SS3921 Wheel Seal - Front

Reliable Wheel Seal for Ford Expedition and F-Series Trucks

The FAG SS3921 wheel seal is engineered to provide durable sealing performance for Ford vehicles, including the Expedition, F-150, F-250, and F-250 Super Duty models. Designed with a metal spring and auxiliary lip, this wheel seal ensures effective protection against contaminants and fluid leaks.

• Seal Type: Metal with spring and auxiliary lip for enhanced sealing
• Sealing Material: Durable nitrile compound for resistance to wear and fluids
• Bore Diameter: 3.934 inches (99.924 mm) for precise fitment
• Seal Outside Diameter: 3.939 inches (100.051 mm) ensuring secure installation
• Seal Width: 16.51 mm for optimal sealing surface

Technical Details of the FAG SS3921 Wheel Seal

This wheel seal features a metal construction with an integrated spring and auxiliary lip, designed to maintain a tight seal under various operating conditions. The nitrile sealing material offers resistance to oils, greases, and other automotive fluids, making it suitable for driveline and axle applications. With a bore diameter of approximately 3.934 inches and an outside diameter near 3.939 inches, the SS3921 provides a precise fit for the wheel hubs of Ford Expedition and F-Series trucks. The 16.51 mm seal width contributes to a reliable barrier against dirt and moisture intrusion.

Compatible Vehicles and Applications

This wheel seal is compatible with the following Ford models:

• Ford Expedition
• Ford F-150
• Ford F-250
• Ford F-250 Super Duty

It is specifically designed for driveline and axle sealing systems, helping to maintain proper lubrication and prevent contamination in wheel assemblies.

Common Issues Addressed by the FAG SS3921 Wheel Seal

• Prevents grease and lubricant leaks from wheel hubs
• Protects against dirt, dust, and moisture ingress
• Reduces risk of premature bearing wear due to contamination
• Maintains driveline integrity under heavy-duty conditions
• Helps avoid costly repairs related to seal failure

Installation Notes and Tips

When installing the FAG SS3921 wheel seal, ensure the sealing surface and bore are clean and free of debris. Use appropriate tools to avoid damaging the seal during installation. Verify the seal orientation matches the auxiliary lip direction to optimize sealing performance. It is recommended to inspect related components such as bearings and hubs for wear or damage before installation.

Quality Assurance and Warranty

FAG manufactures the SS3921 wheel seal to meet stringent quality standards for automotive driveline components. The use of nitrile sealing material and metal spring construction ensures durability and consistent performance. While specific warranty details may vary, FAG products typically come with manufacturer-backed quality assurance to support reliable operation in Ford Expedition and F-Series trucks.