SKF 17720 Transfer Case Output Shaft Seal - Front

SKF 17720 Transfer Case Output Shaft Seal

SKF 17720 is a transfer case output shaft seal built for front-position applications that need reliable fluid retention and contamination control. It is specified with a nitrile/Teflon sealing surface and dimensions that support accurate service on select Chevrolet, GMC, and Dodge 4x4 platforms.

Key Features

• Part number: SKF 17720
• Transfer case output shaft seal for front applications
• Sealing surface type: nitrile/Teflon
• Width: 0.485 in.
• Outside diameter: 3.066 in.
• Shaft diameter: 1.750 in.
• Designed for New Process 205 and select New Process 203 transfer case applications

Fitment and Application Details

Compatible with front transfer case output shaft service on classic 4x4 trucks and SUVs, including Fits 1988-1990 Chevrolet K3500, Front; Fits 1989-1990 Chevrolet V3500, Front; Fits 1987-1990 GMC V3500, Front; and Fits 1975-1980 Chevrolet K10, Front. This SKF 17720 seal also fits select Chevrolet K20, K30, K5 Blazer, GMC K1500, GMC K2500, and Dodge D300, Ramcharger, W150, W200, and W300 front transfer case positions listed for New Process 203 and New Process 205 setups.

This part cross-references 47897 and 465483 for the same application.

What This Seal Helps Address

• Transfer case fluid seepage at the output shaft
• Contamination entering the transfer case through a worn seal
• Wet driveline components caused by seal wear
• Noise or drivability concerns related to low transfer case lubricant level
• Service needs on New Process 203 and New Process 205 front output locations

Installation Notes and Tips

Verify shaft diameter, outside diameter, and width before installation to confirm the seal matches the transfer case housing and output shaft. Inspect the shaft surface for grooves, corrosion, or wear that could shorten seal life, and clean the sealing area thoroughly before assembly. Confirm the transfer case model and hub configuration listed in the vehicle fitment notes before ordering.

Quality Assurance

SKF has a long history in seal engineering and manufactures seals to specific designs using premium materials for the application and operating environment. The brand’s sealing products are built to support long service life and consistent protection against lubricant loss and outside contamination.