National 710594 Differential Pinion Seal - Front Outer or Rear Outer

National 710594 Differential Pinion Seal

National 710594 is a metric differential pinion seal built for rear outer and front outer applications on select Toyota and Lexus vehicles. It uses a bi-directional lip design and polyacrylate material to help maintain a reliable seal at the pinion area where driveline fluid retention matters most.

Key Features

• Part number: 710594
• Oil seal for differential pinion sealing applications
• Bi-directional lip design for sealing performance
• Polyacrylate construction
• Metric dimensions for accurate housing and shaft fit
• Inside diameter: 1.496 in. / 38.000 mm
• Outside diameter: 2.567 in. / 65.210 mm
• Width: 0.394 in. / 10.000 mm
• Overall width with side lip: 0.669 in. / 17.000 mm
• Housing bore: 2.559 in. / 65.000 mm

Detailed Description

National has supplied sealing solutions for more than 75 years, and this differential pinion seal reflects that focus on dimensional accuracy and application-specific fit. The 710594 is engineered as an oil seal with a 40-series type profile, a 1.496-inch shaft diameter, and a 2.567-inch outside diameter to match the specified housing bore. It is used in Toyota and Lexus driveline applications where the pinion seal must retain gear oil and help protect the differential from contamination.

This part cross-references Beck/Arnley 052-4114 for the same application. It also aligns with OE-style service needs for Toyota Sienna, Lexus RX350, Lexus RX330, Toyota Highlander, Toyota RAV4, Lexus RX300, Toyota Previa, Toyota Celica, Toyota Camry, and Toyota Van applications listed below.

Vehicle Fitment

• Fits 2004-2010 Toyota Sienna, Rear Outer. Fits vehicles with 6.7 inch Ring Gear and Toyota Axle.
• Fits 2007-2009 Lexus RX350, Rear Outer. Fits vehicles with 6.7 inch Ring Gear and Toyota Axle.
• Fits 2004-2006 Lexus RX330, Rear Outer. Fits vehicles with 6.7 inch Ring Gear and Toyota Axle.
• Fits 2001-2005 Toyota Highlander, Rear Outer. Fits vehicles with 6.7 inch Ring Gear and Toyota Axle.
• Fits 1996-2005 Toyota RAV4, Rear Outer. Fits vehicles with 6.7 inch Ring Gear and Toyota Axle.
• Fits 1999-2003 Lexus RX300, Rear Outer. Fits vehicles with 6.7 inch Ring Gear and Toyota Axle.
• Fits 1991-1997 Toyota Previa, Front Outer. Fits vehicles with 6.7 inch Ring Gear and Toyota Axle.
• Fits 1988-1993 Toyota Celica, Front Outer. Fits vehicles with 6.7 inch Ring Gear and Toyota Axle.
• Fits 1988-1991 Toyota Camry, Front Outer. Fits vehicles with 6.7 inch Ring Gear and Toyota Axle.
• Fits 1987-1989 Toyota Van, Front Outer. Fits vehicles with 6.7 inch Ring Gear and Toyota Axle.

Common Repair Uses

• Gear oil seepage at the differential pinion area
• Contamination entering the differential through a worn seal
• Leak repair during driveline service on Toyota and Lexus vehicles
• Seal replacement after pinion area wear or age-related hardening
• Maintenance on rear outer or front outer axle assemblies with Toyota axle specifications

Installation Notes and Tips

Verify the shaft, housing bore, and width measurements before installation to confirm the seal matches the differential assembly. Inspect the pinion surface for wear, scoring, or corrosion before fitting the new seal, and clean the sealing area thoroughly so the lip can seat evenly. Confirm the application uses the listed 6.7 inch ring gear and Toyota axle specification before ordering.

Quality Assurance

National is known for sealing products backed by decades of drivetrain and sealing experience. The 710594 is built to metric dimensions and application-specific requirements for consistent service in the listed Toyota and Lexus fitments.