National 710704 Automatic Transmission Output Shaft Seal - Left

Automatic Transmission Output Shaft Seal

National 710704 is an automatic transmission output shaft seal built for metric applications that require a precise sealing surface and stable fit. It uses a fluoro-elastomer construction and a counter-clockwise spiral lip design to help maintain sealing performance in the transmission housing.

Fits 1984-2002 Toyota Corolla, left; 1987-1998 Toyota Tercel, left; and other confirmed Toyota, Geo, Chevrolet, and Scion applications listed below. The National 710704 is sized for a 34.000 mm shaft and a 56.200 mm outside diameter, making it a direct-match service part for select left-side transmission positions.

Key Features

• Part number: 710704
• Automatic transmission output shaft seal / oil seal
• Fluoro-elastomer material for sealing durability
• Counter-clockwise spiral lip design
• Metric dimensions for accurate housing and shaft fit
• Inside diameter: 1.339 in. / 34.000 mm
• Outside diameter: 2.213 in. / 56.200 mm
• Width: 0.335 in. / 8.500 mm
• Overall width with side lip: 0.591 in. / 15.000 mm
• Housing bore: 2.205 in. / 56.000 mm

Detailed Description

National 710704 is part of the 710700 series and is engineered as a metric automatic transmission output shaft seal for select Toyota, Geo, Chevrolet, and Scion vehicles. Its fluoro-elastomer sealing material is selected for transmission service, while the spiral lip profile supports consistent contact at the shaft interface. This part cross-references SKF 15335A for the same application.

Vehicle coverage includes Fits 2012-2015 Scion iQ, left; Fits 2000-2005 Toyota Echo, left; Fits 1998-2002 Chevrolet Prizm, left with Aisin A131L Transmission; Fits 1984-2002 Toyota Corolla, left; Fits 1999 Toyota Tercel, left with 3-Speed Toyota A132L Transmission; Fits 1987-1998 Toyota Tercel, left; Fits 1996-1997 Geo Prizm, left; Fits 1989-1995 Geo Prizm, left with Aisin A131L Transmission; and Fits 1985-1988 Chevrolet Nova, left with Aisin A131L Transmission. National 710704 is also listed with Carlson 13391 interchange coverage.

Common Uses

• Replacing a leaking transmission output shaft seal
• Addressing fluid seepage at the left-side transmission output area
• Restoring sealing at the shaft-to-housing interface
• Correcting contamination caused by worn seal lips
• Service replacement for select Toyota Corolla and Toyota Tercel transmission applications

Installation Notes and Tips

Verify shaft diameter, housing bore, and transmission type before installation. Confirm the left-side application and check for Aisin A131L or Toyota A132L transmission notes where listed. Inspect the shaft surface for wear, scoring, or contamination before installing the new seal, and make sure the sealing lip is oriented correctly for the transmission rotation and application.

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop OE-style sealing components for modern and legacy vehicles. The 710704 reflects that focus with metric sizing, a fluoro-elastomer sealing element, and application-specific fitment for select Toyota Corolla, Toyota Tercel, and related models.