National 710839 Differential Pinion Seal - Front Outer

National 710839 Differential Pinion Seal Overview

The National 710839 differential pinion seal is engineered for reliable sealing performance in Jeep Commander and Grand Cherokee driveline systems. Designed to maintain optimal oil retention, this seal helps protect your vehicle's differential from leaks and contamination.

• Compatible with Jeep Commander and Grand Cherokee models
• Inside diameter: 1.575 inches (40.000 mm)
• Outside diameter: 2.843 inches (72.200 mm)
• Thickness: 0.394 inches (10.000 mm)
• Counter-clockwise spiral lip design for enhanced sealing
• Constructed from durable fluoro-elastomer material
• Overall width with side lip: 0.670 inches (17.000 mm)

Technical Specifications and Design Features

This differential pinion seal from National features a counter-clockwise spiral lip design that improves sealing efficiency by directing oil back into the differential housing. The fluoro-elastomer material offers resistance to heat, oil, and wear, ensuring long-lasting performance under demanding conditions. With an inside diameter of 1.575 inches (40 mm) and an outside diameter of 2.843 inches (72.2 mm), this seal fits precisely into the housing bore of 2.835 inches (72 mm), providing a secure and leak-free fit. The thickness of 0.394 inches (10 mm) and overall width including the side lip of 0.670 inches (17 mm) contribute to its robust sealing capability.

Applications and Problem Solving

• Prevents differential oil leaks in Jeep Commander and Grand Cherokee models
• Protects differential components from dirt and contaminants
• Reduces risk of premature wear due to oil loss
• Maintains proper lubrication for differential pinion shaft
• Helps avoid costly repairs related to seal failure

Installation Notes and Tips

Ensure the differential housing bore is clean and free of debris before installation. Carefully align the National 710839 seal with the pinion shaft 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 direction of shaft rotation for optimal sealing performance.

Quality Assurance and Warranty

Manufactured by National, a trusted name in driveline sealing systems, the 710839 differential pinion seal meets industry standards for durability and performance. The fluoro-elastomer construction provides resistance to heat and chemical degradation, supporting extended service life. Warranty coverage details are available through the manufacturer to ensure confidence in product reliability.