SKF 6903 Transfer Case Shift Shaft Seal

SKF 6903 Transfer Case Shift Shaft Seal

The SKF 6903 transfer case shift shaft seal is built for applications that need a precise seal around the shift shaft to help retain transfer case lubricant and block road contaminants. With a 0.625 shaft diameter, 1.128 outside diameter, and 0.250 width, this nitrile seal is sized for specific transfer case service needs.

Key Features

• Transfer case shift shaft seal for targeted sealing at the shaft interface
• 0.625 shaft diameter for the specified application
• 1.128 outside diameter and 0.250 width for proper fitment
• Nitrile sealing surface type for common drivetrain sealing demands
• SKF engineered seal design backed by long-term sealing expertise
• Cross-reference part number: 1B3344

Application Details

SKF 6903 is a transfer case shift shaft seal used in drivetrain sealing systems where the shift shaft passes through the transfer case housing. It is listed for Jeep CJ7, Jeep Scrambler, and Jeep CJ5 with New Process 300 transfer cases, as well as Ford Bronco with Spicer 18 & 20 and Ford F-100 and F-150 with Spicer 21. This part number 6903 is also associated with additional interchange references for the same application family.

Fits 1980-1986 Jeep CJ7, N/A, New Process 300. Fits 1981-1985 Jeep Scrambler, N/A, New Process 300. Fits 1980-1983 Jeep CJ5, N/A, New Process 300. Fits 1966-1977 Ford Bronco, N/A, Spicer 18 & 20. Fits 1966-1976 Ford F-100, N/A, Spicer 21. Fits 1975-1976 Ford F-150, N/A, Spicer 21.

What It Helps Address

• Transfer case fluid seepage around the shift shaft
• Contamination entering the transfer case through a worn seal
• Leak-related lubricant loss at the shift shaft opening
• Seal wear from age, heat, and drivetrain exposure
• Service replacement for Jeep CJ7, CJ5, Scrambler, and Ford Bronco, F-100, F-150 transfer cases

Installation Notes

Verify shaft diameter, outside diameter, and housing dimensions before installation. Clean the sealing bore and shaft surface thoroughly, and inspect the shift shaft for wear or scoring that can affect sealing performance. Confirm transfer case type and application details against the vehicle listing before service.

Quality Assurance

SKF has a long history in seal engineering and manufactures seals to specific designs using premium materials selected for the application and operating environment. The 6903 is produced to support reliable sealing performance in transfer case service.