National 710991 Axle Output Shaft Seal - Front Left or Rear Left

Overview of National 710991 Axle Output Shaft Seal

The National 710991 axle output shaft seal is engineered for reliable sealing performance in driveline applications. Designed specifically for Chrysler, Dodge, and Jeep vehicles including the 300, Challenger, Charger, Durango, and Grand Cherokee models, this seal helps maintain proper lubrication and prevent contamination.

• Constructed from durable polyacrylate material for enhanced wear resistance
• Bi-directional helix lip design ensures effective sealing in both rotational directions
• Precisely sized with a 2.953 inch (75 mm) housing bore and 1.772 inch (45 mm) shaft diameter
• Overall width with side lip measures 0.512 inch (13 mm) for secure fitment
• Part of the National 710900 series, known for consistent quality in sealing systems

Detailed Product Description and Specifications

The National 710991 axle output shaft seal features a polyacrylate construction that offers resistance to heat, oil, and wear, making it suitable for demanding driveline environments. Its bi-directional lip design provides a reliable seal against oil leaks and contaminants, accommodating shaft rotation in both directions. The seal’s dimensions include a housing bore diameter of 2.953 inches (75 mm) and an outside diameter of 2.961 inches (75.2 mm), ensuring a precise fit in compatible axle housings. The shaft diameter is 1.772 inches (45 mm), with an overall width of 0.354 inches (9 mm) and a total width including the side lip of 0.512 inches (13 mm). This seal is categorized under type 40 and is part of the 710900 series, which is recognized for its application in driveline and axle sealing systems.

Compatible Vehicles and Applications

This axle output shaft seal is compatible with a range of Chrysler, Dodge, and Jeep vehicles. It is designed to fit models such as the Chrysler 300, Dodge Challenger, Dodge Charger, Dodge Durango, and Jeep Grand Cherokee. The National 710991 seal is intended for use in driveline and axle assemblies where maintaining oil containment and preventing dirt ingress is critical.

Common Issues Addressed by the National 710991 Seal

• Prevents oil leaks from the axle output shaft area
• Reduces contamination from dirt and debris entering the axle housing
• Minimizes premature wear of axle components due to lubricant loss
• Maintains proper lubrication for smooth driveline operation
• Helps avoid costly repairs related to seal failure and axle damage

Installation Notes and Tips

• Ensure the housing bore and shaft dimensions match the seal specifications before installation
• Clean the sealing surfaces thoroughly to remove old sealant, dirt, and debris
• Use appropriate tools to press the seal evenly into the housing bore without distortion
• Inspect the shaft for wear or damage that could compromise the seal’s effectiveness
• Apply a light coating of compatible lubricant on the seal lip prior to installation

Quality Assurance and Warranty Information

National seals are manufactured to meet industry standards for durability and performance. The 710991 axle output shaft seal undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty terms may vary, National typically offers coverage against manufacturing defects to provide confidence in product reliability.