National 223340 Manual Transmission Output Shaft Seal - Front or Left

Manual Transmission Output Shaft Seal

National 223340 is a metric manual transmission output shaft seal built with nitrile sealing material and a counter-clockwise spiral lip design. It is specified for a 33.000 mm shaft and a 47.200 mm outside diameter, making it a direct-fit sealing component for select Audi, Nissan, Infiniti, and Mercury applications.

Use National 223340 when you need a manual transmission output shaft seal for vehicles such as the Audi S5, Audi S4, Nissan Pathfinder, and Nissan Maxima. This seal is part of National’s 220000 series and is engineered for precise shaft and housing bore dimensions.

Key Features

• Part number: 223340
• Manual transmission output shaft seal / oil seal
• Nitrile sealing material for transmission sealing applications
• Counter-clockwise spiral lip design
• Metric dimensions for accurate shaft and housing fit
• Inside diameter: 33.000 mm (1.299 in)
• Outside diameter: 47.200 mm (1.858 in)
• Width: 8.000 mm (0.315 in)
• Housing bore: 47.000 mm (1.850 in)

Detailed Description

National 223340 is a manual transmission output shaft seal designed to retain transmission fluid at the output shaft interface and help maintain proper sealing under operating conditions. The nitrile sealing material and spiral lip profile are selected for controlled contact at the shaft surface, while the metric sizing supports accurate installation in the housing bore. This seal is used in applications including the 2008-2013 Audi S5, 2013 Audi S4, 1987-1995 Nissan Pathfinder, 1985-1994 Nissan Maxima, 1984-1989 Nissan 300ZX, and 1984-1988 Nissan 200SX. National has supplied sealing solutions for more than 75 years, and this part reflects that focus on dimensional accuracy and transmission sealing performance. This part cross-references Four Seasons (e.g., 66881) for the same application.

What It Helps Fix

• Transmission fluid leakage at the output shaft
• Oil seepage around the manual transmission housing bore
• Seal wear from shaft rotation and heat exposure
• Contamination entering the transmission through a worn seal
• Loss of sealing integrity during service on select Audi, Nissan, Infiniti, and Mercury vehicles

Installation Notes and Tips

Verify shaft diameter, housing bore, and seal orientation before installation. The counter-clockwise spiral lip design must be installed in the correct direction for the application. Inspect the shaft surface for grooves or scoring, and clean the bore thoroughly before pressing the seal into place. Confirm vehicle-specific fitment for the exact year, make, model, and position before ordering. Fits 2017 Audi S5, left. Fits 2008-2013 Audi S5, left. Fits 2013 Audi S4, left. Fits 1993-1998 Mercury Villager, front. Fits 1993-1997 INFINITI J30, front. Fits 1987-1995 Nissan Pathfinder, front. Fits 1995 Nissan Pickup, front. Fits 1993-1995 Nissan Quest, front. Fits 1986-1994 Nissan D21, front. Fits 1985-1994 Nissan Maxima, front. Fits 1990-1992 INFINITI M30, front. Fits 1984-1989 Nissan 300ZX, front. Fits 1988-1989 Nissan Pulsar NX, front. Fits 1984-1988 Nissan 200SX, front.

Quality Assurance

National is a long-established sealing brand with a history of supplying transmission and oil seal solutions for automotive service. Part number 223340 is manufactured to metric specifications and aligned to the listed OE-style applications for consistent fitment.