National 482163N Manual Transmission Input Shaft Seal

Manual Transmission Input Shaft Seal for Classic Dodge and Ford Applications

The National 482163N is a manual transmission input shaft seal built for select Dodge and Ford trucks and SUVs with New Process and Tremec transmissions. It uses polyacrylate sealing material with Redicoat protection to help maintain a tight seal at the transmission input shaft.

National has supplied sealing solutions for more than 75 years, and this oil seal is part of the 480000 series. The 482163N is a zero duplication part, making it a direct-reference option for specific manual transmission service work.

Key Features

• Part number: 482163N
• Manual transmission input shaft seal / oil seal
• Polyacrylate construction
• Redicoat: Yes
• Series: 480000
• Inside diameter: 1.375 in. / 34.930 mm
• Outside diameter: 1.987 in. / 50.470 mm
• Thickness: 0.312 in. / 7.920 mm
• Housing bore: 1.983 in. / 50.370 mm
• Zero duplication part

Detailed Description

National 482163N is engineered for manual transmission input shaft sealing in applications using New Process 435A, 435L, 435FE, 435FL, 445, and Tremec 140VS or 141VS transmissions. It is listed for a wide range of Dodge D100, D150, D200, D250, D300, D350, Ramcharger, W100, W150, W200, W250, and W350 models, along with Ford F-100, F-150, F-250, F-350, Bronco, Mustang, and Mercury Capri applications. If you are servicing a Dodge D150 manual transmission input shaft seal or a Ford F-250 transmission seal application, this part number is a direct fit reference for the listed configurations.

This part cross-references BBB Industries 13557 for the same application.

What This Seal Helps Address

• Transmission fluid leakage at the input shaft
• Oil seepage around the bellhousing area
• Contamination from worn or hardened sealing surfaces
• Service replacement for aging manual transmission seals
• Fitment-specific repair needs on classic Dodge and Ford drivetrains

Installation Notes and Tips

Verify transmission type before installation, since fitment varies by New Process and Tremec unit. Inspect the input shaft, housing bore, and surrounding sealing surface for wear, scoring, or debris before installing the new seal. Clean the bore thoroughly and confirm the seal dimensions match the application: 1.375-inch shaft diameter, 1.987-inch outside diameter, and 0.312-inch width.

For best results, confirm the vehicle, transmission code, and seal dimensions against the service information for your Dodge or Ford manual transmission repair.

Quality Assurance

National has a long-standing reputation in sealing technology and has delivered premium sealing solutions for more than 75 years. The 482163N is built as a precision oil seal for the listed manual transmission applications and is backed by National’s established engineering focus on modern and legacy vehicle sealing needs.