National 710159 Transfer Case Input Shaft Seal - Inner

Transfer Case Input Shaft Seal for Toyota and Lexus

National 710159 is a metric transfer case input shaft seal built for specific Toyota and Lexus 4WD applications. It uses a polyacrylate sealing material and is sized for a 43.000 mm shaft with a 58.620 mm outside diameter, making it a direct-fit sealing component for the transfer case input area.

Use National 710159 when servicing transfer case leaks on vehicles such as the Toyota 4Runner, Tacoma, Tundra, FJ Cruiser, and Lexus GX460 or GX470 with the listed Aisin transfer case configurations. The part number 710159 is also a useful reference when matching OE-style sealing dimensions for the correct application.

Key Features

• Transfer case input shaft seal for drivetrain sealing service
• Polyacrylate sealing material for oil resistance in transfer case applications
• Metric dimensions: 43.000 mm shaft size, 58.620 mm outside diameter, 7.500 mm width
• Housing bore diameter: 58.470 mm
• National Series 710100, Type 72 oil seal design
• Fits select Toyota and Lexus 4WD models with Aisin transfer cases

Detailed Description

National 710159 is an oil seal for the transfer case input shaft, engineered around metric dimensions and a polyacrylate sealing element. The seal measures 1.693 inches inside diameter, 2.308 inches outside diameter, and 0.295 inches thick, with a 43.000 mm shaft size and 58.620 mm outside diameter. These specifications matter when replacing a worn seal in the transfer case housing, where correct fit is critical to controlling fluid retention and preventing contamination.

This part fits a wide range of Toyota and Lexus vehicles, including 2010-2019 Lexus GX460, 2003-2009 Lexus GX470, 2003-2019 Toyota 4Runner, 2003-2015 Toyota Tacoma, 2000-2004 and 2003-2006 Toyota Tundra, and 2007-2014 Toyota FJ Cruiser in the listed Aisin VF2A, VF2BM, VF2CM, VF4B, and VF4BM transfer case configurations. National 710159 is also cross-referenced to SKF 16924 for the same application.

What It Helps Fix

• Transfer case fluid seepage at the input shaft
• Oil leakage around the transfer case housing bore
• Seal wear from age, heat, and drivetrain use
• Contamination entering the transfer case through a damaged seal
• Noise or drivability concerns caused by low transfer case fluid level

Installation Notes and Tips

Confirm the transfer case code and shaft dimensions before installation, especially on Toyota 4Runner, Tacoma, Tundra, FJ Cruiser, and Lexus GX models with Aisin transfer cases. Inspect the shaft surface and housing bore for scoring, corrosion, or wear before pressing in the new seal. Clean the sealing area thoroughly and verify the seal seats evenly to help maintain proper fluid control.

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop sealing components for modern vehicles. Part number 710159 reflects that focus with a metric oil seal design intended for precise drivetrain service.