National 1973 Wheel Seal - Front, Front Inner or Rear Inner

National 1973 Wheel Seal Overview

National 1973 is a metric wheel seal built with nitrile sealing material for dependable sealing performance in driveline and axle service. With a 48.000 mm shaft size, 65.300 mm outside diameter, and 8.000 mm width, it is sized for specific Nissan, INFINITI, Suzuki, Volkswagen, Mercury, and Mazda applications.

National has supplied sealing solutions for more than 75 years, and this seal reflects that focus with precise dimensions and OE-style fitment support for automatic transmission extension housing and wheel seal applications where listed.

• Part number: 1973
• Nitrile sealing material for sealing performance in demanding drivetrain environments
• Metric dimensions: 48.000 mm inside diameter, 65.300 mm outside diameter, 8.000 mm width
• Housing bore: 65.000 mm
• Series 1000, Type 25 construction
• Fits select Nissan Armada, Frontier, TITAN, and TITAN XD applications
• Also listed for select INFINITI Q50, Q60, Q70, QX80, and QX56 applications

Fitment Details

Compatible With select applications including Fits 2017-2020 Nissan Armada, N/A; Fits 2014-2019 INFINITI Q50, N/A; Fits 2017-2019 INFINITI Q60, N/A; Fits 2014-2019 INFINITI Q70, N/A; Fits 2015-2019 INFINITI Q70L, N/A; Fits 2014-2019 INFINITI QX80, N/A; Fits 2016-2019 Nissan Frontier, N/A; Fits 2017-2019 Nissan TITAN, N/A; and Fits 2016-2019 Nissan TITAN XD, N/A.

Additional coverage includes Fits 2005-2015 Nissan Armada with Jatco JR509E Transmission, Fits 2005-2015 Nissan Frontier with Jatco JR507E Transmission, Fits 2004-2015 Nissan TITAN with Jatco JR509E Transmission, and Fits 2005-2015 Nissan Xterra with Jatco JR507E Transmission. This part cross-references Gates 18965 and Centric Parts 417.90005 for the same application.

What This Seal Helps Address

• Transmission or axle fluid seepage at the seal interface
• Wear at the shaft sealing surface
• Contamination entering the housing through a worn seal
• Noise or drivability concerns related to low fluid levels
• Service replacement for aging extension housing seals

Installation Notes and Tips

Verify shaft diameter, housing bore, width, and transmission family before installation. Clean the sealing surface and housing bore thoroughly, and inspect for scoring, corrosion, or burrs that could affect seal life. Confirm the vehicle’s transmission code or axle configuration against the listed fitment, especially on Nissan Armada, Frontier, TITAN, and INFINITI QX56 applications.

Quality Assurance

National is recognized for sealing products and has supported the aftermarket for more than 75 years. Part number 1973 is manufactured to metric specifications and listed with detailed dimensional data to support accurate replacement selection.