National 714675 Differential Pinion Seal - Front Outer or Rear Outer

National 714675 Differential Pinion Seal Overview

The National 714675 differential pinion seal is engineered to provide reliable sealing performance for driveline applications. Designed with a bi-directional lip and constructed from durable fluoro-elastomer, this oil seal is compatible with various Dodge, Ford, Hummer, Jeep, Lincoln, Mazda, and Mercury models.

• Inside diameter: 1.844 inches (46.838 mm)
• Outside diameter: 2.753 inches (69.926 mm)
• Flanged outside diameter: 3.089 inches (78.460 mm)
• Thickness/width: 0.425 inches (10.800 mm)
• Bi-directional lip design for enhanced sealing
• Material: Fluoro-elastomer for chemical and temperature resistance
• Redicoat surface treatment for improved durability
• Compatible with housing bore of 2.748 inches (69.799 mm)

Technical Details and Construction

The National 714675 differential pinion seal features a bi-directional lip design that helps prevent oil leakage in both rotational directions, making it suitable for differential pinion shafts. Its fluoro-elastomer material offers resistance to heat, oil, and other automotive fluids, ensuring long service life under demanding conditions. The seal’s precise dimensions, including a 1.844-inch inside diameter and a 2.753-inch outside diameter, ensure a proper fit in compatible differentials. Additionally, the Redicoat treatment enhances the seal’s surface durability, reducing wear and extending operational reliability.

Compatible Vehicles and Applications

This differential pinion seal is compatible with a range of vehicles, including Dodge Dakota and Durango, Ford Explorer and Ranger, Hummer H1, Jeep Grand Cherokee, Liberty, and TJ, Lincoln Aviator and Mountaineer, Mazda B3000 and B4000, and Mercury Mountaineer. The part number 714675 is designed to meet the specifications required for these models, ensuring proper fit and function in their driveline systems.

Common Issues Addressed by the National 714675 Seal

• Prevents oil leaks from the differential pinion shaft
• Reduces contamination ingress into the differential housing
• Maintains proper lubrication levels within the differential
• Minimizes wear on differential components caused by fluid loss
• Helps avoid costly drivetrain repairs due to seal failure

Installation Notes and Tips

When installing the National 714675 differential pinion seal, ensure the housing bore and shaft are clean and free of debris. Use appropriate tools to press the seal evenly into the housing bore without damaging the sealing lip. Verify the seal orientation matches the bi-directional lip design for optimal performance. It is recommended to inspect the differential components for wear or damage during installation and replace any compromised parts to maintain system integrity.

Quality Assurance and Warranty

National manufactures the 714675 differential pinion seal to meet industry standards for durability and performance. The fluoro-elastomer material and Redicoat treatment contribute to the seal’s resistance to heat and chemical exposure. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in the product’s reliability.