National 710734 Differential Pinion Seal - Rear Outer

National 710734 Differential Pinion Seal

National 710734 is a metric differential pinion seal built for rear outer applications on select Toyota and Lexus vehicles. It uses a polyacrylate sealing material and a clockwise-spiral lip design to help maintain a tight seal at the pinion shaft.

Fits 2007-2019 Toyota Tundra, rear outer; Fits 2008-2019 Toyota Sequoia, rear outer; Fits 2008-2011 Toyota Land Cruiser, rear outer; Fits 2008-2009 Lexus GX470, rear outer. This part cross-references Gates 19802 for the same application.

Key Features

• Part number 710734 differential pinion seal
• Metric dimensions: 52.000 mm inside diameter, 87.200 mm outside diameter, and 10.300 mm width
• Polyacrylate construction for sealing performance in driveline service
• Clockwise-spiral lip design
• Housing bore: 87.000 mm
• Overall width with side lip: 17.000 mm
• Type 40 oil seal design

Detailed Description

National 710734 is an oil seal for the differential pinion area, where the pinion shaft passes through the housing and requires controlled sealing under driveline load. The seal’s metric sizing, 52.000 mm shaft diameter, and 87.000 mm housing bore specification support accurate replacement on Toyota axle applications. Its polyacrylate material and spiral lip profile are selected for sealing consistency in rear axle service.

Use this seal when servicing the rear outer pinion area on Toyota Tundra, Toyota Sequoia, Toyota Land Cruiser, and Lexus GX470 models listed in the fitment data. The National 710734 part number is also a useful reference when matching OE-style dimensions during differential repair.

Common Issues This Seal Can Address

• Gear oil leakage at the differential pinion area
• Wet or oily residue around the rear axle housing
• Seal wear from age, heat, or driveline contamination
• Loss of sealing integrity after differential service
• Noise or driveline concerns associated with low lubricant level from leakage

Installation Notes and Tips

Confirm shaft diameter, housing bore, and overall seal dimensions before installation. Inspect the pinion yoke and sealing surface for grooves, corrosion, or damage that could affect the new seal. Clean the bore thoroughly and install the seal squarely to avoid distortion of the lip. Verify axle configuration and rear outer application on the vehicle before ordering.

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop replacement parts for modern vehicle service needs. National 710734 reflects that focus with a metric oil seal design intended for precise driveline sealing in the listed Toyota and Lexus applications.