National 450308 Manual Transmission Output Shaft Seal

Overview of National Manual Transmission Output Shaft Seal 450308

The National 450308 manual transmission output shaft seal is designed to provide reliable sealing performance for select Ford and Jeep vehicles. Constructed from durable nitrile material, this oil seal helps maintain transmission fluid integrity and prevent leaks in demanding driving conditions.

• Material: Nitrile for enhanced resistance to oil and wear
• Inside Diameter: 2.125 inches (53.980 mm)
• Outside Diameter: 3.066 inches (77.880 mm)
• Thickness/Width: 0.500 inches (12.700 mm)
• Redicoat surface treatment for improved sealing and durability
• Compatible with Ford F-100, F-250, F-350 and Jeep Wagoneer models
• Part Number: 450308, Series 450000

Technical Details and Specifications

This National output shaft seal features a precise fit with a housing bore diameter of 3.061 inches (77.750 mm) and a shaft diameter of 2.125 inches (53.980 mm). The nitrile construction offers resistance to petroleum-based fluids and high temperatures commonly encountered in manual transmission systems. The Redicoat coating enhances the seal’s ability to maintain a tight barrier against fluid leakage, extending service life and reducing maintenance intervals.

Compatible Vehicles and Applications

This manual transmission output shaft seal is compatible with the following vehicles:

• Ford F-100
• Ford F-250
• Ford F-350
• Jeep Wagoneer

It is specifically designed to replace worn or damaged seals in these models, ensuring proper transmission function and fluid retention.

Common Issues Addressed by Part Number 450308

• Prevents transmission fluid leaks from the output shaft area
• Reduces contamination ingress into the transmission system
• Minimizes wear on transmission components caused by fluid loss
• Helps maintain proper transmission pressure and performance
• Eliminates noise and vibration caused by seal failure

Installation Notes and Tips

• Ensure the transmission output shaft and housing bore are clean and free of debris before installation
• Use appropriate tools to avoid damaging the seal during installation
• Verify correct orientation of the seal lip to maintain effective sealing
• Check for proper fitment with the specified inside and outside diameters
• Consult vehicle service manual for torque specifications and installation procedures

Quality Assurance and Warranty

National’s 450308 output shaft seal is manufactured to meet industry standards for durability and performance. The nitrile material and Redicoat treatment contribute to long-lasting service life under normal operating conditions. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in their products.