National 710870 Transfer Case Output Shaft Seal - Rear

Transfer Case Output Shaft Seal for Toyota and Lexus

National 710870 is a metric transfer case output shaft seal built for rear-position applications in select Toyota and Lexus full-time 4WD vehicles. It uses nitrile sealing material and a clockwise-spiral lip design to help maintain a consistent seal at the transfer case output shaft.

With a 1.339 in. shaft diameter, 1.898 in. outside diameter, and 0.315 in. width, this oil seal is sized for the specified Aisin transfer case applications. National 710870 is a direct-fit sealing solution for drivers servicing a Toyota RAV4, Highlander, Sienna, or Lexus RX-series model with the correct transfer case configuration.

Key Features

• Transfer case output shaft seal for rear-position applications
• Nitrile sealing material for oil resistance in drivetrain service
• Clockwise-spiral lip design for controlled sealing performance
• Metric dimensions: 34.000 mm shaft, 48.200 mm outside diameter, 8.000 mm width
• Housing bore: 48.000 mm
• Part description: oil seal
• National part number 710870

Detailed Description

National 710870 is engineered as a transfer case output shaft seal for vehicles using the listed Aisin transfer case assemblies. It is sized for a 34.000 mm shaft and 48.200 mm outside diameter, with an 8.000 mm width and 13.000 mm overall width with side lip. The nitrile sealing material is selected for drivetrain oil sealing, while the clockwise-spiral lip design supports sealing at the output shaft interface.

This seal is a strong match for fitment-based searches such as transfer case output shaft seal for 2004-2016 Toyota RAV4 rear, 2001-2010 Toyota Highlander rear, and 2007-2010 Toyota Sienna rear. It also applies to 1999-2003 Lexus RX300 rear, 2004-2006 Lexus RX330 rear, 2006 Lexus RX400h rear, and 2007-2009 Lexus RX350 rear when equipped with the specified transfer case.

This part cross-references OE-style numbers 24-52-0-418-437 and 90311-34021 for the same application.

What It Helps Address

• Transfer case oil seepage at the output shaft
• Fluid loss around the rear transfer case seal area
• Seal wear from age, heat, and drivetrain rotation
• Maintenance replacement during transfer case service
• Leak repair on Aisin GF1A, MF2A, and MF2AV transfer case applications

Installation Notes and Tips

Verify shaft diameter, housing bore, and transfer case type before installation. Clean the bore and shaft sealing surface thoroughly, and inspect for grooves or damage that could affect sealing. Confirm rear-position fitment against the vehicle’s transfer case configuration before pressing the seal into place.

• Fits 2004-2016 Toyota RAV4, Rear, Full Time 4WD; with Aisin GF1A Transfer Case; 1 Speed
• Fits 2001-2010 Toyota Highlander, Rear, Full Time 4WD; with Aisin MF2A Transfer Case; 1 Speed
• Fits 2007-2010 Toyota Sienna, Rear, Full Time 4WD; with Aisin GF1A Transfer Case; 1 Speed
• Fits 2007-2009 Lexus RX350, Rear, Full Time 4WD; with Aisin MF2AV Transfer Case; 1 Speed
• Fits 2004-2006 Lexus RX330, Rear, Full Time 4WD; with Aisin MF2AV Transfer Case; 1 Speed
• Fits 2006 Lexus RX400h, Rear, Full Time 4WD; with Aisin MF2AV Transfer Case; 1 Speed
• Fits 1999-2003 Lexus RX300, Rear, Full Time 4WD; with Aisin MF2AV Transfer Case; 1 Speed

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop sealing components for modern vehicle service needs. National 710870 reflects that focus with a metric oil seal design intended for the specified Toyota and Lexus transfer case applications.