National 331107N Automatic Transmission Oil Pump Seal - Front

Overview of National 331107N Automatic Transmission Oil Pump Seal

The National 331107N automatic transmission oil pump seal is engineered to provide reliable sealing performance for various Ford, Lincoln, and Mercury vehicles. Designed with durable silicone material, this oil seal ensures effective containment of transmission fluid, helping maintain optimal transmission function.

• Inside diameter: 2.000 inches (50.800 mm)
• Outside diameter: 2.750 inches (69.850 mm)
• Thickness/width: 0.375 inches (9.530 mm)
• Sealing material: Silicone for enhanced durability and flexibility
• Compatible with housing bore approximately 2.746 inches (69.750 mm)

Detailed Product Description and Specifications

The National 331107N oil seal is part of the 330000 series and is specifically designed for automatic transmission oil pumps. Its silicone construction offers resistance to heat and transmission fluids, ensuring a tight seal around the shaft and housing bore. The seal’s dimensions—2.000 inch inside diameter and 2.750 inch outside diameter—make it suitable for a range of Ford, Lincoln, and Mercury models, including popular vehicles such as the Ford Mustang, Bronco, F-150, and Lincoln Continental. The 0.375 inch thickness provides a robust barrier against leaks, maintaining transmission fluid integrity and preventing contamination.

Compatible Vehicles and Applications

This oil pump seal is compatible with a variety of Ford, Lincoln, and Mercury vehicles, including but not limited to:

• Ford Bronco, Bronco II, Mustang, F-100, F-150, F-250, F-350
• Lincoln Continental, Mark VI, Mark VII, Town Car, Versailles
• Mercury Cougar, Marquis, Villager, Zephyr
• Ford Econoline series: E-100, E-150, E-250, E-350 and their Club Wagon variants

Common Issues Addressed by the National 331107N Seal

• Prevents automatic transmission fluid leaks around the oil pump shaft
• Reduces risk of transmission overheating due to fluid loss
• Maintains proper hydraulic pressure within the transmission system
• Protects transmission components from dirt and contaminants
• Helps avoid costly transmission repairs caused by seal failure

Installation Notes and Tips

• Ensure the housing bore and shaft are clean and free of debris before installation
• Use appropriate tools to avoid damaging the silicone seal during installation
• Verify seal orientation matches manufacturer specifications for proper fit
• Check for any wear or damage on mating surfaces to ensure optimal sealing
• Consult vehicle service manual for torque specifications and installation procedures

Quality Assurance and Warranty Information

National manufactures the 331107N oil pump seal to meet industry standards for durability and performance. The silicone material is selected for its resistance to heat and transmission fluids, contributing to long service life. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in the product’s reliability.