National 710798 Manual Transmission Output Shaft Seal - Rear or Rear Left

Manual Transmission Output Shaft Seal for OE-Style Service

The National 710798 manual transmission output shaft seal is built for direct sealing service in the transmission and sealing systems category. It uses a polyacrylate sealing material and a bi-directional lip design to help maintain a consistent seal at the output shaft in applications such as Honda Pilot, Honda Ridgeline, Acura MDX, and Ford Fiesta with the specified transmissions and differentials.

National has supplied sealing solutions for more than 75 years, and this seal reflects that focus on dimensional accuracy and application coverage. The 710798 is a metric oil seal with a 40.000 mm shaft size, 55.200 mm outside diameter, and 7.500 mm width.

Key Features

• Part number: National 710798
• Manual transmission output shaft seal / oil seal
• Polyacrylate sealing material for sealing performance
• Bi-directional lip design
• Metric dimensions for OE-style fitment
• Inside diameter: 1.575 in. / 40.000 mm
• Outside diameter: 2.173 in. / 55.200 mm
• Width: 0.295 in. / 7.500 mm
• Overall width with side lip: 0.472 in. / 12.000 mm
• Housing bore: 2.165 in. / 55.000 mm

Detailed Description

National 710798 is a metric output shaft seal engineered for transmission sealing service where shaft rotation and fluid retention are critical. The bi-directional lip design supports sealing in either rotational direction, while the polyacrylate material provides a durable sealing surface for the specified shaft and housing dimensions. This seal is part of National’s 710700 series and is identified as Type 40.

Use this seal for direct replacement service on vehicles including 2003-2015 Honda Pilot rear with Honda VTM-4 differential, 2006-2014 Honda Ridgeline rear with Honda VTM-4 differential, and 2001-2011 Acura MDX rear with Honda VTM-4 differential. It also applies to 2011-2015 Ford Fiesta with Ford IB5 transmission and 2000-2004 Ford Focus with Ford IB5 transmission. This part cross-references SKF 15757A for the same application. The National 710798 part number is also commonly searched alongside Honda Pilot and Acura MDX rear differential seal applications.

What This Seal Helps Address

• Transmission or differential fluid leakage at the output shaft
• Seal wear from shaft rotation and age-related hardening
• Fluid seepage around the housing bore
• Noise or contamination concerns caused by low fluid level
• Service replacement for worn OE-style output shaft seals

Installation Notes and Tips

Verify the shaft diameter, housing bore, and seal width before installation. Clean the bore and shaft surface thoroughly, and inspect for grooves, corrosion, or scoring that can affect sealing. Install the seal squarely to avoid lip damage, and confirm the lip orientation matches the application. For fitment searches, this part is listed for 2013-2018 Acura RDX rear with Honda VTM-4 differential, 2015 Honda Crosstour rear left with Honda DPS differential, and the Honda Pilot and Honda Ridgeline rear applications noted above.

Quality Assurance

National has a long history in sealing technology and continues to develop sealing solutions for modern vehicles. The 710798 is built to metric specifications and application-matched dimensions for service on vehicles such as Acura MDX, Honda Pilot, and Ford Fiesta where the listed transmission or differential setup applies.