National 710808 Manual Transmission Output Shaft Seal

Manual Transmission Output Shaft Seal

National 710808 is a manual transmission output shaft seal built for metric applications that need a precise sealing surface and stable fit. It uses a polyacrylate sealing material and a bi-directional lip design to help maintain a consistent seal at the transmission shaft.

Compatible With Ford Focus, Mercury Cougar, Ford Contour, Mercury Mystique, and other listed manual transmission applications, this seal is sized for the shaft and housing dimensions shown below. The National 710808 part number is also referenced in OE and aftermarket cross-reference listings for select Ford, Jaguar, Lincoln, Mercury, and Dodge manual transmission applications.

• Polyacrylate construction for sealing performance in transmission service
• Bi-directional lip design for shaft sealing in either rotational direction
• Metric dimensions: 40.000 mm inside diameter, 55.100 mm outside diameter, 12.000 mm width
• Flanged outside diameter: 62.200 mm
• Housing bore: 55.000 mm
• Part description: oil seal for manual transmission output shaft service

Application Details

National 710808 is used as a manual transmission shift shaft seal on vehicles equipped with Ford MTX-75 transmission applications, including 2000-2016 Ford Focus, 2003-2004 Jaguar S-Type, 2002-2004 Jaguar X-Type, 2000-2002 Lincoln LS, 1999-2002 Mercury Cougar, 1995-2000 Ford Contour, 1995-2000 Mercury Mystique, and 1998-1999 Mercury Tracer. It also applies to 2008-2009 Dodge Caliber with New Process T355 transmission and 2000-2002 Lincoln LS with Getrag 221 transmission.

What It Helps Address

• Transmission fluid seepage at the output shaft
• Oil residue around the shift shaft or seal bore
• Seal wear from age, heat, and normal drivetrain use
• Loss of sealing integrity during manual transmission service
• Leak-related contamination of surrounding transmission components

Installation Notes and Tips

Verify shaft diameter, housing bore, and width before installation to confirm the seal matches the transmission case. Clean the bore and shaft surface thoroughly, and inspect for grooves, corrosion, or damage that could affect sealing. This part is commonly used on Ford Focus and Mercury Cougar manual transmission applications, so confirming the transmission code and model year is important before service.

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop sealing components for current vehicle applications. The 710808 is part of National’s 710800 series and is built to the dimensional and material specifications listed above.