SKF 18872 Transfer Case Output Shaft Seal - Front or Rear Lower

SKF 18872 Transfer Case Output Shaft Seal

SKF 18872 is a transfer case output shaft seal built for applications that need reliable fluid retention at the output shaft. With a nitrile sealing surface and precise dimensions, it is suited for New Process 203 transfer case service on select Ford trucks and Broncos.

• Transfer case output shaft seal for select Ford applications
• Nitrile sealing surface type for dependable sealing performance
• Outside diameter: 3.066 in.
• Shaft diameter: 1.875 in.
• Width: 0.313 in.
• SKF part number 18872

Application Details

Fits 1978-1979 Ford Bronco, front and rear lower, with New Process 203 transfer case models. Fits 1977-1978 Ford F-100, front, 1.875" I.D.; New Process 203. Fits 1977-1978 Ford F-150, front, 1.875" I.D.; New Process 203. Fits 1977-1978 Ford F-250, front, New Process 203. This part cross-references Four Seasons 47906 for the same application.

How It Helps

• Stops transfer case fluid from escaping at the output shaft
• Helps keep dirt and road contaminants out of the sealing area
• Addresses wet housing, seepage, or drip conditions around the transfer case output
• Supports proper lubrication retention in New Process 203-equipped drivetrains

Installation Notes

Verify shaft diameter, outside diameter, and width before installation to confirm correct fitment. Inspect the output shaft surface for wear, scoring, or corrosion, since seal performance depends on a smooth sealing surface. Clean the bore and surrounding area thoroughly before installing SKF 18872, and confirm the seal is seated squarely to avoid premature leakage.

Quality Assurance

SKF has a long history in seal engineering, including early integrated shaft seal development and continued refinement of sealing designs and bonding methods. SKF 18872 is manufactured to specific design requirements using premium materials selected for the application and operating environment.