FAG SS3098 Transfer Case Output Shaft Seal - Front, Front Forward or Rear

Transfer Case Output Shaft Seal for Ford Trucks

FAG SS3098 is a transfer case output shaft seal built for specific Ford truck applications, including Ford F-100 and Ford F-250 models. It uses a nitrile sealing material with a metal shell, spring, and auxiliary lip to help maintain a tight seal at the transfer case output shaft.

Compatible With 1959-1979 Ford F-100 and 1959-1972 Ford F-250 applications, this seal is specified for front, rear, and N/A positions depending on the vehicle configuration. The FAG SS3098 part number is also referenced in interchange listings for direct application matching.

Key Features

• Part number: SS3098
• Transfer case output shaft seal for select Ford truck drivetrains
• Nitrile sealing material for oil resistance and sealing durability
• Metal, spring, auxiliary lip, and inner shell seal construction
• Specified bore diameter: 2.875 in. (73.025 mm)
• Specified seal outside diameter: 2.879 in. (73.127 mm)
• Specified seal width: 2.125 in. (53.975 mm)
• Cross-reference part numbers include 4133098100 and 21108

Detailed Description

FAG SS3098 is engineered for transfer case sealing applications where shaft support and fluid retention are critical. The seal dimensions, including bore diameter, outside diameter, and width, are listed to help confirm proper application match before installation. For Ford F-100 and Ford F-250 trucks, this seal is used in transfer case output shaft locations across the listed front, rear, and N/A configurations.

This part cross-references Schaeffler 4133098100 and Remy 21108 for the same application. When replacing a worn transfer case output shaft seal on a Ford F-100 or Ford F-250, verifying the transfer case type and shaft dimensions is essential for correct fitment.

What It Helps Address

• Transfer case fluid leakage at the output shaft
• Contamination from dirt, dust, and moisture entering the sealing area
• Grease or lubricant loss around the shaft interface
• Seal wear caused by age, heat, and drivetrain use
• Improper sealing from a mismatched transfer case seal size

Installation Notes and Tips

Confirm the transfer case model, shaft diameter, and seal dimensions before installation. Inspect the shaft surface for grooves, corrosion, or scoring that could affect sealing performance. Clean the bore and sealing surface thoroughly, and install the seal squarely to avoid distortion of the metal shell or sealing lip.

For Ford F-100 and Ford F-250 applications, match the vehicle year, position, and transfer case notes exactly to the listed fitment. The FAG SS3098 part number should be checked against the existing seal and vehicle service information before replacement.

Quality Assurance

FAG specifies this seal using high-quality materials and application-based engineering standards to meet vehicle manufacturer requirements. The seal design is focused on protecting drivetrain components from contamination while helping retain lubricant over the service life of the bearing and related transfer case parts.