National 5872S Transfer Case Input Shaft Seal - Front

Reliable Transfer Case Input Shaft Seal for Ford and Jeep

The National 5872S Transfer Case Input Shaft Seal is engineered to provide a precise fit and durable sealing solution for select Ford and Jeep models. Designed with nitrile material, this oil seal ensures effective protection against leaks and contamination in your vehicle's transfer case.

• Inside diameter: 1.375 inches (34.930 mm)
• Outside diameter: 2.004 inches (50.900 mm)
• Thickness/width: 0.320 inches (8.130 mm)
• Sealing material: Nitrile for resistance to oil and wear
• Compatible housing bore: 2.000 inches (50.800 mm)
• Part number: 5872S

Detailed Product Description

The National 5872S transfer case input shaft seal is part of the 5000 series and is specifically designed to maintain the integrity of the transfer case by preventing oil leaks around the input shaft. Constructed from nitrile, a material known for its resistance to petroleum-based fluids and abrasion, this seal offers reliable performance under demanding conditions. The precise dimensions, including a 1.375-inch inside diameter and a 2.004-inch outside diameter, ensure a secure fit within the housing bore of 2.000 inches, making it suitable for transfer cases in Ford Aerostar and Jeep Cherokee and Wagoneer models.

Applications and Problem Solving

• Prevents oil leaks from the transfer case input shaft
• Protects transfer case internals from dirt and contaminants
• Reduces wear on the input shaft by maintaining proper lubrication
• Helps maintain transfer case pressure and performance
• Addresses common seal failure issues in Ford Aerostar and Jeep Cherokee/Wagoneer transfer cases

Installation Notes and Tips

Ensure the transfer case housing bore is clean and free of debris before installation. Carefully align the National 5872S seal to avoid damage during insertion. Use appropriate tools to press the seal evenly into place without distortion. Verify the shaft and seal dimensions match the specifications to prevent premature wear or leaks.

Quality Assurance and Warranty

Manufactured by National, a recognized brand in sealing systems, the 5872S transfer case input shaft seal meets industry standards for durability and performance. The nitrile material provides resistance to oil and environmental factors, contributing to a longer service life. Warranty details are subject to the manufacturer's terms and conditions.