National 710583 Automatic Transmission Output Shaft Seal - Right

Automatic Transmission Output Shaft Seal

National 710583 is an automatic transmission output shaft seal built for metric applications that require a precise sealing surface and stable fit. It uses a bi-directional lip design and polyacrylate material to help maintain sealing performance at the transmission output shaft.

Compatible With select Ford, Chevrolet, GMC, Buick, Cadillac, Lincoln, and related applications, including vehicles such as the Ford Explorer, Chevrolet Equinox, and Buick Enclave. National 710583 is engineered for the right-side position where listed in the fitment data.

Key Features

• Automatic transmission output shaft seal for metric applications
• Bi-directional lip design for sealing in either rotational direction
• Polyacrylate construction for transmission sealing service
• Inside diameter: 1.378 in. / 35.000 mm
• Outside diameter: 2.808 in. / 71.330 mm
• Thickness: 0.413 in. / 10.500 mm
• Overall width with side lip: 0.866 in. / 22.000 mm
• Housing bore: 2.795 in. / 71.000 mm
• National part number 710583

Detailed Description

National 710583 is part of the 710500 series and is identified as an oil seal for automatic transmission service. The seal’s metric dimensions, including a 35 mm shaft size and 71.330 mm outside diameter, support accurate fitment in the specified transmission housing bore. National has supplied sealing solutions for more than 75 years, and this seal reflects that focus on dimensional consistency and modern vehicle coverage. This part cross-references OSC 13786 for the same application.

Fitment coverage includes right-side applications on vehicles such as the 2008-2019 Chevrolet Equinox, 2007-2019 GMC Acadia, 2008-2017 Buick Enclave, 2014-2019 Ford Explorer, and 2013-2019 Cadillac XTS. It also applies to other listed models including the Ford Flex, Lincoln MKZ, Chevrolet Malibu, and Buick Regal. For buyers searching for a National 710583 automatic transmission output shaft seal for Ford Explorer, Chevrolet Equinox, or Buick Enclave service, this part number matches the listed applications.

What It Helps Address

• Transmission fluid leakage at the output shaft area
• Seal wear from age, heat, and fluid exposure
• Loss of sealing integrity at the housing bore
• Service replacement needs on listed right-side applications
• Fitment matching for metric transmission sealing repairs

Installation Notes and Tips

Verify the shaft diameter, housing bore, and transmission type before installation. Confirm the vehicle’s right-side application and any transmission-specific notes, such as Ford 6F50 or 6F55 coverage where listed. Inspect the shaft surface and bore for scoring, corrosion, or debris before installing the new seal. Clean the sealing area thoroughly and seat the seal evenly to avoid distortion.

Quality Assurance

National is a long-established sealing brand with a history of supplying premium sealing solutions for automotive service. Part number 710583 is built to the listed dimensional specifications and application data for consistent replacement use.