National 100537 Drive Axle Shaft Seal - Rear

Overview of National Drive Axle Shaft Seal 100537

The National Drive Axle Shaft Seal 100537 is engineered for reliable sealing performance in driveline applications. Designed specifically for Ford, Lincoln, and Mercury vehicles, this oil seal helps maintain axle integrity and prevent fluid leaks in models such as the Explorer, Mustang, and Navigator.

• Inside diameter: 1.811 inches (46.000 mm)
• Outside diameter: 2.881 inches (73.177 mm)
• Flanged outside diameter: 3.228 inches (82.000 mm)
• Thickness: 0.472 inches (12.000 mm)
• Material: Durable fluoro-elastomer with Redicoat coating
• Housing bore diameter: 2.874 inches (73.000 mm)
• Compatible with Ford, Lincoln, Mercury driveline systems

Technical Description and Material Details

This drive axle shaft seal from National, part number 100537, is constructed from fluoro-elastomer, a material known for its resistance to heat, oil, and wear. The seal features a Redicoat surface treatment that enhances durability and reduces friction during operation. With precise dimensions including a 1.811-inch inside diameter and a 2.881-inch outside diameter, it fits securely within the housing bore of 2.874 inches, ensuring a tight seal around the axle shaft. The flanged outside diameter of 3.228 inches provides additional stability during installation and operation.

Compatible Vehicles and Applications

This drive axle shaft seal is compatible with a range of Ford, Lincoln, and Mercury models, including the Aviator, Blackwood, Cougar, Expedition, Explorer, Mark VII, Mark VIII, Mountaineer, Mustang, Navigator, and Thunderbird. It is designed to maintain axle shaft sealing integrity in these vehicles’ driveline and axle assemblies, helping to prevent oil leaks and contamination.

Common Issues Addressed by National Drive Axle Shaft Seal 100537

• Prevents oil leaks from the axle shaft area
• Protects driveline components from dirt and debris intrusion
• Reduces wear caused by fluid contamination
• Maintains proper lubrication within the axle assembly
• Helps avoid costly driveline repairs due to seal failure

Installation Notes and Tips

Ensure the housing bore and axle shaft surfaces are clean and free of debris before installation. Use appropriate tools to press the seal evenly into the housing bore without damaging the flange or sealing lip. Verify the seal orientation matches the original part to maintain proper sealing function. Lubricate the seal lip lightly with compatible oil to reduce initial wear during startup.

Quality Assurance and Warranty Information

National drive axle shaft seals are manufactured to meet OEM specifications for fit and function. The fluoro-elastomer material and Redicoat treatment provide enhanced durability under typical operating conditions. Part number 100537 is backed by National’s quality standards, ensuring reliable performance in compatible Ford, Lincoln, and Mercury vehicles. Warranty coverage details should be confirmed with the original equipment manufacturer or authorized distributor.