National 472439 Manual Transmission Output Shaft Seal

Overview of National Manual Transmission Output Shaft Seal 472439

The National 472439 manual transmission output shaft seal is designed to provide reliable sealing performance for select Jeep models. Constructed from durable nitrile material, this oil seal helps maintain transmission fluid integrity and prevent leaks in the output shaft area.

• Material: Nitrile for enhanced resistance to oil and wear
• Inside Diameter: 1.875 inches (47.630 mm)
• Outside Diameter: 2.627 inches (66.730 mm)
• Thickness/Width: 0.312 inches (7.920 mm)
• Redicoat finish for improved sealing and durability
• Compatible with Jeep Cherokee, CJ5, CJ7, Grand Wagoneer, and Scrambler models
• Part Number: 472439

Detailed Product Description and Specifications

This National manual transmission output shaft seal (part number 472439) is engineered to fit the housing bore diameter of approximately 2.623 inches (66.620 mm) and shaft diameter of 1.875 inches (47.630 mm). The nitrile construction offers resistance to petroleum-based fluids and high temperatures commonly found in manual transmission systems. The Redicoat treatment enhances the seal’s ability to maintain a tight fit and reduce wear over time. With a width of 0.312 inches (7.920 mm), this seal is designed to provide a secure barrier against fluid leakage while accommodating the dynamic movement of the output shaft.

Compatible Jeep Models and Applications

This output shaft seal is compatible with a range of Jeep vehicles, including the Cherokee, CJ5, CJ7, Grand Wagoneer, and Scrambler. It is specifically designed for manual transmission systems in these models, ensuring proper fitment and function. Using the correct seal helps maintain transmission performance and prevents contamination of the transmission fluid.

Common Issues Addressed by the National 472439 Seal

• Prevents transmission fluid leaks from the output shaft area
• Reduces risk of contamination entering the transmission
• Minimizes wear on the output shaft and housing bore
• Maintains proper lubrication within the manual transmission
• Helps avoid costly transmission repairs due to seal failure

Installation Notes and Tips

• Ensure the housing bore and shaft are clean and free of debris before installation
• Use appropriate tools to press the seal evenly into the bore without damage
• Verify the seal orientation matches the original part for correct sealing
• Check shaft surface for wear or damage that could affect seal performance
• Apply a light coating of transmission fluid or compatible lubricant to the seal lip before installation

Quality Assurance and Warranty Information

National transmission seals are manufactured to meet industry standards for durability and performance. The 472439 output shaft seal is a zero duplication part, ensuring it meets exact specifications for fit and function. While specific warranty details may vary, National products typically come with a limited warranty against defects in material and workmanship. Proper installation and use according to vehicle specifications are essential to maintain warranty coverage.