FAG SS2157 Transfer Case Shift Shaft Seal

Transfer Case Shift Shaft Seal for NP205 Applications

The FAG SS2157 transfer case shift shaft seal is built for vehicles using the New Process 205 transfer case, including classic Ford, Dodge, Chevrolet, GMC, and Jeep applications. With a nitrile sealing material, metal reinforcement, spring tension, and an auxiliary lip, this seal is designed to maintain a tight seal at the shift shaft and help keep contaminants out of the transfer case.

Use this seal when servicing a transfer case that needs a precise OE-style sealing solution for the shift shaft area. The FAG SS2157 is sized with a 1.25 inch bore diameter, 1.254 inch outside diameter, and 0.75 inch width for application-specific fitment.

Key Features

• Part number: SS2157
• Transfer case shift shaft seal for New Process 205 applications
• Nitrile sealing material for fluid resistance
• Metal, spring, and auxiliary lip seal design
• Bore diameter: 1.25 in. / 31.75 mm
• Seal outside diameter: 1.254 in. / 31.852 mm
• Seal width: 0.75 in. / 19.05 mm
• Cross-reference: National 470954

Detailed Description

FAG SS2157 is a transfer case shift shaft seal engineered for vehicles equipped with the NP205 transfer case, including Fits 1975-1979 Ford F-150, Fits 1974-1979 Ford F-250, Fits 1979 Ford F-350, Fits 1986-1987 Dodge D100, and Fits 1988-1990 Chevrolet C3500. It also covers additional applications such as Fits 1963-1973 Jeep Wagoneer and several GMC and Dodge truck platforms listed in the fitment data. The seal construction combines a metal case, spring-loaded sealing edge, and auxiliary lip to help maintain sealing performance at the shaft interface.

This part number, SS2157, is intended for transfer case service where the shift shaft seal must match the specified bore and outside diameter dimensions. FAG sources materials and designs seals to meet vehicle manufacturer specifications, with an emphasis on protecting internal components from dirt, dust, and moisture while retaining lubricant at the bearing or shaft area.

What It Helps Address

• Transfer case fluid seepage at the shift shaft
• Contamination entering the transfer case through a worn seal
• Loss of lubricant around the shaft opening
• Seal wear from age, heat, and mileage
• Service issues on NP205-equipped Ford, Dodge, Chevrolet, GMC, and Jeep vehicles

Installation Notes and Tips

Verify transfer case type, shaft diameter, and seal dimensions before installation. Clean the bore and shaft area thoroughly, inspect for grooves or corrosion, and confirm the seal seats evenly to the specified depth. For best results, match the application to the vehicle notes shown for NP205 and Ross Gear listings before ordering the FAG SS2157.

Quality Assurance

FAG designs seals using high-quality materials and application-specific specifications to support consistent sealing performance in demanding drivetrain environments. This part cross-references National 470954 for the same application.