SKF 19778 Transfer Case Input Shaft Seal - Rear

SKF Transfer Case Input Shaft Seal 19778

SKF 19778 is a transfer case input shaft seal built around precise dimensions and sealing materials for drivetrain service. It is specified with a 2.000 shaft diameter, 2.690 outside diameter, and 0.375 width, with a nitrile sealing surface type for dependable fluid control in the transfer case assembly.

Key Features

• Transfer case input shaft seal for drivetrain sealing service
• Part number 19778 for accurate ordering and replacement
• 2.000 shaft diameter for the specified shaft size
• 2.690 outside diameter for proper housing fit
• 0.375 width for the listed seal profile
• Nitrile sealing surface type for fluid sealing performance

Product Details

SKF has a long history in seal engineering, beginning with the first integrated shaft seal and continuing with modern bonding and material methods. This seal is manufactured to specific design requirements using premium materials so the sealing properties match the application and operating environment. For transfer case service, that means a focused fit for retaining lubricant and helping keep contaminants out of the assembly. This SKF 19778 seal is a direct-fit style service part for drivetrain maintenance, and it is listed for 1974-1976 Ford F-250 applications with New Process 203 transfer case notes. This part cross-references 201319C91 and C0NN1190B for the same application.

Common Problems It Can Address

• Transfer case fluid seepage at the input shaft area
• Lubricant loss from a worn or hardened seal lip
• Contamination entering the transfer case through the shaft opening
• Noise or drivability concerns related to low transfer case fluid level
• Service replacement for aging seal material on Ford F-250 transfer case repairs

Installation Notes and Tips

Verify the shaft diameter, outside diameter, and seal width before installation to confirm the seal matches the housing and shaft dimensions. Inspect the shaft surface for wear, scoring, or corrosion before installing the new seal, since surface damage can shorten seal life. Clean the bore and sealing area thoroughly, and install the seal squarely to avoid distortion. Fits 1974-1976 Ford F-250, N/A, with notes for transfer case output shaft seal compatibility on New Process 203 models.

Quality Assurance

SKF designs and manufactures seals to high quality standards with an emphasis on long service life and safety. The 19778 seal reflects that engineering approach with application-specific materials and dimensions for transfer case sealing service.