National 710173 Manual Transmission Output Shaft Seal - Front or Left

Manual Transmission Output Shaft Seal for OE-Style Service

National 710173 is a manual transmission output shaft seal built for precise sealing at the transmission shaft interface. It uses a polyacrylate sealing material and a clockwise-spiral lip design to help maintain a consistent seal in demanding driveline applications.

With metric dimensions and a 50 mm shaft size, this National oil seal is a direct-fit style service part for select Lexus, Toyota, Porsche, Kia, Acura, Honda, Chevrolet, Buick, Pontiac, Oldsmobile, and Jeep applications. The National 710173 is engineered for vehicles that need dependable sealing performance at the output shaft area.

Key Features

• Manual transmission output shaft seal for transmission sealing service
• Polyacrylate sealing material for durable sealing performance
• Clockwise-spiral lip design for controlled sealing contact
• Metric dimensions: 50.000 mm inside diameter, 70.200 mm outside diameter, 10.000 mm width
• Overall width with side lip: 16.000 mm
• Housing bore: 70.000 mm
• National 710173 part number for accurate ordering and lookup

Detailed Description

National 710173 is an oil seal in the 710100 series, designed for manual transmission output shaft sealing where the shaft measures 1.969 in. (50.000 mm). The seal’s polyacrylate construction and clockwise-spiral lip profile are specified to support stable sealing at the transmission output area. This makes it a practical replacement for service work on vehicles such as the Toyota Land Cruiser, Lexus LX470, and Porsche Carrera GT, as well as additional listed applications.

This part cross-references Four Seasons 20216 and Gates 19635 for the same application. When searching for a manual transmission output shaft seal for Toyota Land Cruiser front, Lexus LX470 front, or other listed fitments, National 710173 is the reference number to use.

What This Seal Helps Address

• Transmission fluid seepage at the output shaft
• Oil leakage around the shaft-to-housing sealing surface
• Contamination entering the transmission through a worn seal
• Seal wear caused by age, heat, and driveline use
• Service replacement needs on select front-position applications

Installation Notes and Tips

Verify shaft diameter, housing bore, and seal width before installation. Inspect the shaft surface for grooves or scoring, and clean the bore thoroughly so the seal seats evenly. Use proper installation tools to avoid distorting the lip or damaging the sealing edge. Confirm the application notes for vehicles such as Lexus LX470, Toyota Land Cruiser, and Acura TL before ordering.

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop sealing products for modern vehicle service needs. The 710173 reflects that focus with a metric OE-style design intended for accurate fitment and dependable transmission sealing.