National 710877 Differential Pinion Seal - Rear Outer

National 710877 Differential Pinion Seal Overview

The National 710877 differential pinion seal is engineered for reliable sealing performance in Jeep driveline systems. Designed specifically for Jeep Commander, Grand Cherokee, Wrangler, and Wrangler JK models, this oil seal helps maintain optimal differential function by preventing fluid leaks.

• Inside diameter options: 1.807 inch and 45.900 mm
• Outside diameter: 3.168 inch (80.460 mm) with flanged outside diameter of 3.425 inch (87.000 mm)
• Thickness: 0.563 inch (14.300 mm)
• Overall width with side lip: 0.750 inch (19.050 mm)
• Material: durable fluoro-elastomer for enhanced resistance to heat and chemicals
• Clockwise-spiral lip design for effective sealing
• Compatible housing bore: 3.160 inch (80.264 mm)
• Shaft diameter compatibility: 1.875 inch (47.625 mm)

Technical Details and Material Specifications

This differential pinion seal from National is part of the 710800 series and is constructed from fluoro-elastomer, a material known for its high resistance to heat, oil, and chemical degradation. The seal features a clockwise-spiral lip design that ensures a tight fit around the pinion shaft, minimizing the risk of oil leaks in the differential assembly. With precise dimensions including a 3.168 inch outside diameter and 0.563 inch thickness, it fits securely within the housing bore of 3.160 inches, providing a reliable barrier against contaminants.

Compatible Jeep Models and Applications

This National 710877 differential pinion seal is compatible with several Jeep models, including the Commander, Grand Cherokee, Wrangler, and Wrangler JK. It is designed to replace worn or damaged seals in the differential pinion area, helping to maintain proper lubrication and prevent fluid loss.

• Prevents differential oil leaks
• Reduces risk of contamination entering the differential
• Maintains proper lubrication of pinion shaft
• Helps avoid costly differential repairs
• Ensures smooth driveline operation

Installation Notes and Tips

When installing the National 710877 differential pinion seal, ensure the housing bore and shaft are clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the fluoro-elastomer material. Verify the seal orientation matches the clockwise-spiral lip design for optimal sealing performance. It is recommended to inspect the pinion shaft for wear or damage before installation to ensure a proper fit.

Quality Assurance and Warranty Information

National manufactures the 710877 differential pinion seal to meet industry standards for durability and performance. The use of fluoro-elastomer material provides resistance to heat and chemical exposure commonly found in automotive differentials. While specific warranty details are not provided, National products typically adhere to strict quality control processes to ensure reliable service life in compatible Jeep models.