National 223235 Manual Transmission Input Shaft Seal - Front

Manual Transmission Input Shaft Seal for OE-Style Service

National 223235 is a metric manual transmission input shaft seal built for sealing the transmission input shaft where it passes through the housing. With a polyacrylate sealing material and precise metric dimensions, it is suited for service work on applications such as Toyota Corolla, Toyota Celica, Toyota MR2, Geo Prizm, Acura NSX, and Chevrolet Nova.

This part cross-references Four Seasons 12718 for the same application.

Key Features

• Manual transmission input shaft seal / oil seal for transmission sealing service
• Polyacrylate sealing material for durable fluid control
• Metric dimensions: 32.000 mm shaft size, 46.230 mm outside diameter, 6.000 mm width
• Housing bore: 46.000 mm for dimensional match-up during replacement
• National 223235 part number for catalog and interchange lookup
• Fits a wide range of manual transmission applications across Toyota, Geo, Acura, and Chevrolet models

Detailed Description

National 223235 is a manual transmission input shaft seal designed around a 32.000 mm shaft and 46.230 mm outside diameter, with a 6.000 mm width and 46.000 mm housing bore. The polyacrylate sealing material is selected for transmission sealing service where consistent contact and fluid retention are required. National has supplied sealing solutions for more than 75 years, and this seal reflects that focus on dimensional accuracy and service replacement needs. It is a direct-fit style oil seal for vehicles including 1991-2005 Acura NSX, 1993-1997 Geo Prizm, 1994-1997 Toyota Celica, 1993-1997 Toyota Corolla, 1985-1989 Toyota MR2, 1985-1988 Chevrolet Nova, and 1980-1988 Toyota Tercel. National 223235 is also a useful reference when searching by interchange or OE-style replacement needs for manual transmission input shaft sealing.

Common Problems This Seal Can Address

• Transmission fluid seepage at the input shaft area
• Oil residue around the bellhousing or transmission case
• Seal wear from age, heat, and normal drivetrain use
• Leak-related clutch contamination from failed shaft sealing
• Service replacement during manual transmission repair or rebuild

Installation Notes and Tips

Verify shaft diameter, housing bore, and seal width before installation to confirm the correct match for your transmission. Inspect the input shaft surface for scoring or wear, and clean the bore thoroughly before pressing in the new seal. For best results, install the seal squarely and avoid damaging the sealing lip during assembly. Confirm vehicle-specific fitment for the exact year, make, model, and transmission configuration before ordering.

Quality Assurance

National is a long-established sealing brand with a reputation built on premium sealing solutions and ongoing product development for modern vehicles. Part number 223235 is manufactured to support accurate replacement in manual transmission service applications.