National 710976 Automatic Transmission Output Shaft Seal - Left

Automatic Transmission Output Shaft Seal for Mitsubishi F4A42

National 710976 is an automatic transmission output shaft seal built for metric applications that use the Mitsubishi F4A42 transmission. It is specified for left-side fitments on select Hyundai, Kia, Chrysler, Dodge, and Mitsubishi vehicles, including Hyundai Sonata, Kia Optima, and Mitsubishi Galant applications.

Key Features

• Automatic transmission output shaft seal / oil seal
• Metric dimensions for accurate housing and shaft fit
• Polyacrylate sealing material
• Counter-clockwise spiral lip design
• Inside diameter: 35.000 mm (1.378 in)
• Outside diameter: 56.100 mm (2.209 in)
• Housing bore: 56.000 mm (2.205 in)
• Width: 9.000 mm (0.354 in)
• Overall width with side lip: 12.600 mm (0.496 in)
• Flanged outside diameter: 62.000 mm (2.441 in)

Detailed Description

National 710976 is engineered as a transmission sealing component for the output shaft area, where consistent sealing is critical to keeping automatic transmission fluid contained. The polyacrylate construction and counter-clockwise spiral lip design support the sealing interface used in Mitsubishi F4A42-equipped vehicles. This part number is a direct fit reference for applications such as 1999-2005 Hyundai Sonata, 2001-2006 Kia Optima, and 1999-2003 Mitsubishi Galant, all in left-side positions with the Mitsubishi F4A42 transmission. National has focused on sealing solutions for decades, and this seal reflects that experience in a metric OE-style format. Part number 710976 also cross-references SKF 13782A for the same application.

What This Seal Helps Address

• Transmission fluid seepage at the output shaft
• Fluid loss around the axle or shaft seal area
• Contamination entering the transmission through a worn seal
• Leaks caused by hardened or damaged sealing lips
• Service issues on Mitsubishi F4A42-equipped left-side applications

Installation Notes and Tips

Verify shaft diameter, housing bore, and transmission code before installation. This seal is specified for metric dimensions and left-side applications with the Mitsubishi F4A42 transmission. Inspect the shaft surface for wear, scoring, or corrosion before installing National 710976, and confirm the seal lip orientation matches the transmission rotation and application requirements. Clean the bore thoroughly so the seal seats evenly.

Quality Assurance

National has supplied premium sealing solutions for more than 75 years, with product development focused on current vehicle sealing requirements. Part number 710976 is built to meet the dimensional and material demands of transmission service work on covered Hyundai, Kia, Chrysler, Dodge, and Mitsubishi applications.