National FC-66998 Drive Axle Shaft Bearing - Front Outer or Rear

Overview of National FC-66998 Drive Axle Shaft Bearing

The National FC-66998 drive axle shaft bearing is engineered for precision and durability in driveline applications. Designed as a needle bearing, it supports smooth rotation and reduces friction in axle shafts for select Ford, Jaguar, Lincoln, and Mercury vehicles.

• Needle bearing type for efficient load distribution
• Bore diameter of 1.5748 inches (40.00 mm)
• Outside diameter approximately 1.9696 inches (50.03 mm)
• Width of 0.6004 inches (15.25 mm)
• Compatible with multiple Ford, Jaguar, Lincoln, and Mercury models

Technical Specifications and Dimensions

This drive axle shaft bearing features a bore diameter of 1.5748 inches (40.00 mm), matching the shaft diameter max of 1.5748 inches (39.9999 mm) to ensure a precise fit. The housing diameter ranges between 1.9696 inches (50.0278 mm) and 1.9706 inches (50.0532 mm), with an outside diameter of 1.9696 inches (50.0270 mm). The bearing width is 0.6004 inches (15.25 mm), providing adequate surface area for load handling. These dimensions make the FC-66998 suitable for driveline components requiring tight tolerances and reliable performance.

Compatible Vehicles and Applications

The National FC-66998 bearing is compatible with a range of Ford, Jaguar, Lincoln, and Mercury vehicles. This includes Ford models such as the F-150, F-250, Explorer, Mustang, and Expedition. It also fits Lincoln Aviator, Mark LT, Mark VII, Mark VIII, Navigator, Mountaineer, and Mercury Cougar, Mountaineer, and Blackwood. Jaguar fitment includes the S-Type, XF, XJ8, XJR, XK, and XKR. This bearing is designed specifically for driveline and axle shaft applications in these vehicles, ensuring proper fit and function.

Common Issues Addressed by FC-66998 Bearing

• Excessive axle shaft play or looseness
• Noise or vibration from worn driveline bearings
• Premature bearing wear due to improper fit
• Reduced driveline efficiency and increased friction
• Axle shaft misalignment affecting vehicle handling

Installation Notes and Tips

When installing the National FC-66998 drive axle shaft bearing, ensure the bore and shaft diameters are clean and free of debris. Use proper tools to press the bearing into the housing without applying excessive force that could damage the needle rollers. Verify the housing diameter matches the bearing specifications to maintain correct fitment. Lubricate the bearing as recommended by the vehicle manufacturer to promote longevity and smooth operation.

Quality Assurance and Warranty

National bearings are manufactured to meet industry standards for durability and precision. The FC-66998 drive axle shaft bearing 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 provide confidence in product reliability.