National 710403 Transfer Case Output Shaft Seal - Front or Rear

Overview of National Transfer Case Output Shaft Seal 710403

The National 710403 transfer case output shaft seal is engineered to provide reliable sealing performance for a variety of vehicle models including Acura, Ford, Hyundai, and Mercedes-Benz. Designed with durable nitrile material, this oil seal helps maintain transfer case integrity by preventing fluid leaks and contamination.

• Inside diameter: 1.625 inches (41.270 mm)
• Outside diameter: 2.444 inches (62.080 mm)
• Thickness/width: 0.472 inches (12.000 mm)
• Sealing material: Nitrile for enhanced resistance to oil and wear
• Compatible with multiple makes and models including Ford Explorer, Lincoln Aviator, and Kia Sorento

Detailed Product Description and Specifications

The National 710403 transfer case output shaft seal is part of the 710400 series, designed specifically for transfer case applications requiring precise sealing solutions. Constructed from nitrile, a synthetic rubber known for its oil resistance and durability, this seal features an inside diameter of 1.625 inches and an outside diameter of 2.444 inches, fitting housing bores measuring approximately 2.440 inches (61.980 mm). The 0.472-inch thickness ensures a secure fit and effective sealing against fluid leaks. This seal is suitable for transfer cases in vehicles such as the Ford Explorer Sport Trac, Acura SLX, and Mercedes-Benz ML350, providing a reliable barrier against contaminants and fluid loss.

Compatible Vehicles and Common Applications

This transfer case output shaft seal is compatible with a range of vehicles, including but not limited to:

• Acura SLX
• Ford Explorer, Explorer Sport, Explorer Sport Trac, Bronco II, Ranger
• Hyundai Santa Fe, Kia Sorento, Borrego
• Lincoln Aviator, Mercury Mountaineer
• Isuzu B2300, B3000, B4000, Rodeo, Trooper, VehiCROSS
• Mazda B2300, B3000, B4000
• Mercedes-Benz ML320, ML350, ML430, ML500, ML55 AMG

Common Issues Addressed by the National 710403 Seal

• Prevents transfer case fluid leaks that can cause damage to internal components
• Reduces contamination from dirt and debris entering the transfer case
• Maintains proper lubrication for output shaft bearings and gears
• Helps avoid costly repairs related to seal failure or wear
• Ensures consistent transfer case performance and longevity

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 nitrile seal during installation
• Verify the seal orientation matches the original part for proper sealing
• Check shaft and bore dimensions to confirm compatibility with the 1.625-inch shaft and 2.444-inch outside diameter
• Apply a light coat of transfer case fluid to the seal lip to ease installation and improve sealing

Quality Assurance and Warranty Information

National transfer case output shaft seals are manufactured to meet industry standards for durability and performance. The nitrile material offers resistance to oil, heat, and wear, ensuring a dependable seal under normal operating conditions. While specific warranty details may vary, National typically provides coverage against manufacturing defects to support product reliability and customer confidence.