National 710905 Manual Transmission Output Shaft Seal

Overview of National 710905 Manual Transmission Output Shaft Seal

The National 710905 manual transmission output shaft seal is engineered for reliable sealing performance in Dodge Ram 2500 and Ram 3500 models. Designed with precision, this polyacrylate oil seal helps maintain transmission integrity by preventing fluid leaks and contamination.

• Constructed from durable polyacrylate material for enhanced wear resistance
• Counter-clockwise spiral lip design for effective sealing and reduced leakage
• Inside diameter of 1.965 inches (49.9 mm) to fit output shafts accurately
• Outside diameter of 3.079 inches (78.2 mm) matching housing bore dimensions
• Thickness of 0.394 inches (10 mm) with an overall width including side lip of 0.512 inches (13 mm)

Detailed Product Description and Specifications

This National 710905 output shaft seal is part of the 710900 series, specifically designed for manual transmissions in Dodge Ram 2500 and Ram 3500 trucks. The seal features a counter-clockwise spiral lip that enhances sealing efficiency by maintaining consistent contact with the rotating shaft, minimizing oil leakage. Its polyacrylate construction offers resistance to heat, oil, and wear, ensuring durability under demanding transmission conditions.

The seal’s precise dimensions include an inside diameter of 1.965 inches (49.9 mm) to fit the output shaft snugly, and an outside diameter of 3.079 inches (78.2 mm) that corresponds to the housing bore size of 3.071 inches (78 mm). The thickness of 0.394 inches (10 mm) and overall width with side lip of 0.512 inches (13 mm) provide a secure fit and effective sealing surface.

Applications and Common Issues Addressed

• Prevents manual transmission fluid leaks in Dodge Ram 2500 and Ram 3500 models
• Protects transmission components from dirt and contaminants
• Reduces risk of premature transmission wear due to fluid loss
• Maintains proper lubrication within the transmission output shaft area
• Helps avoid costly transmission repairs related to seal failure

Installation Notes and Tips

Ensure the transmission output shaft and housing bore are clean and free of debris before installation. Carefully align the National 710905 seal to avoid damage to the sealing lip. Use appropriate tools to press the seal evenly into the housing bore without distortion. Verify the counter-clockwise spiral lip orientation matches the shaft rotation direction for optimal sealing performance.

Quality Assurance and Warranty

National transmission seals are manufactured to meet industry standards for durability and fitment accuracy. The 710905 manual transmission output shaft seal undergoes quality control inspections to ensure consistent performance. Warranty coverage details should be confirmed with the product documentation or supplier.