National 710870 Transfer Case Output Shaft Seal - Rear

Reliable Transfer Case Output Shaft Seal for Lexus and Toyota

The National 710870 transfer case output shaft seal is engineered to provide a precise fit and durable sealing performance for select Lexus and Toyota models. Designed with high-quality nitrile material and a clockwise-spiral lip design, this oil seal helps maintain optimal transfer case function by preventing fluid leaks.

• Inside diameter: 1.339 inches (34.000 mm)
• Outside diameter: 1.898 inches (48.200 mm)
• Thickness: 0.315 inches (8.000 mm)
• Sealing material: Nitrile for resistance to oil and wear
• Clockwise-spiral lip design for effective sealing
• Compatible housing bore: 1.890 inches (48.000 mm)
• Overall width with side lip: 0.512 inches (13.000 mm)

Detailed Product Description

The National 710870 transfer case output shaft seal is part of the 710800 series, designed specifically for transfer case applications requiring reliable oil sealing. Constructed from nitrile, this seal offers resistance to heat, oil, and abrasion, ensuring long-lasting performance in demanding automotive environments. The clockwise-spiral lip design enhances sealing efficiency by directing contaminants away from the shaft, reducing the risk of leaks and premature wear. With precise dimensions including a 1.339-inch inside diameter and a 1.898-inch outside diameter, this seal fits transfer case output shafts with a 1.890-inch housing bore, making it suitable for various Lexus and Toyota vehicles.

Compatible Vehicles and Applications

This transfer case output shaft seal is compatible with the following Lexus and Toyota models:

• Lexus RX300, RX330, RX350, RX400h
• Toyota Highlander, RAV4, Sienna

It is designed to address common transfer case sealing issues such as oil leaks, contamination ingress, and shaft wear, helping maintain proper transfer case operation and vehicle drivability.

Common Issues Addressed by This Seal

• Prevents transfer case fluid leaks around the output shaft
• Protects against dirt and debris entering the transfer case
• Reduces wear on the output shaft and housing bore
• Maintains transfer case pressure and lubrication
• Helps avoid costly transfer case damage due to seal failure

Installation Notes and Tips

Ensure the transfer case output shaft and housing bore are clean and free of debris before installation. Carefully align the National 710870 seal to avoid damage to the sealing lip. Use appropriate tools to press the seal evenly into the housing bore without distortion. Verify the seal’s clockwise-spiral lip orientation matches the shaft rotation direction for optimal sealing performance.

Quality Assurance and Warranty

National transfer case output shaft seals are manufactured to meet strict quality standards for durability and fitment. The 710870 seal is made from high-grade nitrile material to withstand automotive operating conditions. While specific warranty details are not provided, National products typically adhere to industry standards for reliability and performance.