National 710525 Differential Pinion Seal - Rear Outer

National 710525 Differential Pinion Seal

National 710525 is a metric differential pinion seal built for rear outer applications on Toyota and Lexus driveline setups. It uses a nitrile sealing element with a clockwise-spiral lip design to help maintain a tight seal at the pinion area where gear oil retention is critical.

Key Features

• Part number: 710525
• Part type: differential pinion seal / oil seal
• Material: nitrile
• Helix type: clockwise-spiral lip design
• Inside diameter: 1.732 in. / 44.000 mm
• Outside diameter: 2.921 in. / 74.200 mm
• Thickness: 0.433 in. / 11.000 mm
• Housing bore: 2.913 in. / 74.000 mm
• Metric unit of dimension

Detailed Description

National 710525 is engineered for rear outer differential pinion sealing on select Toyota Tacoma, Tundra, Sequoia, T100, Supra, and Lexus GX470, GS300, GS400, GS430, LS400, LS430, SC300, and SC400 applications. It is sized for Toyota axle configurations and 8-inch or 8.4-inch ring gear setups where specified, making it a direct-fit sealing solution for a wide range of Toyota and Lexus rear differential service jobs. This part cross-references Beck/Arnley 052-3929 for the same application.

What It Helps Address

• Gear oil seepage at the differential pinion area
• Wet housing or driveline contamination around the pinion seal
• Seal wear from age, heat, and drivetrain movement
• Service replacement during differential maintenance
• Leak repair on Toyota and Lexus rear axle assemblies

Installation Notes and Tips

Verify shaft and housing dimensions before installation: 1.732 in. shaft diameter, 2.913 in. housing bore, and 0.433 in. seal width. Inspect the pinion yoke surface for grooves or corrosion before installing the new seal, and confirm the axle configuration and ring gear size match the listed fitment. Fits 1995-2016 Toyota Tacoma, Rear Outer; Fits 2000-2006 Toyota Tundra, Rear Outer; Fits 2001-2007 Toyota Sequoia, Rear Outer; Fits 2003-2007 Lexus GX470, Rear Outer; Fits 1993-2003 Lexus GS300, Rear Outer; Fits 2001-2003 Lexus GS430, Rear Outer; Fits 2001-2003 Lexus LS430, Rear Outer; Fits 2002-2003 Lexus SC430, Rear Outer; Fits 1998-2000 Lexus GS400, Rear Outer; Fits 1998-2000 Lexus LS400, Rear Outer; Fits 1992-2000 Lexus SC300, Rear Outer; Fits 1992-2000 Lexus SC400, Rear Outer; Fits 1993-1998 Toyota Supra, Rear Outer; Fits 1993-1998 Toyota T100, Rear Outer.

Quality Assurance

National has supplied sealing products for more than 75 years and continues to develop sealing solutions for modern vehicles. The 710525 is part of the National 710500 series and is built to metric specifications for consistent fit and sealing performance in the listed Toyota and Lexus applications.