SKF 21768 Automatic Transmission Seal - Rear

SKF Automatic Transmission Seal 21768

SKF 21768 is an automatic transmission seal built for rear transfer case applications that demand precise sealing performance. It is engineered with a polyacrylate sealing surface and sized to match the specified shaft and housing dimensions for a proper service fit.

Key Features

• Automatic transmission seal for rear applications
• Polyacrylate sealing surface type
• Width: 1.504 in.
• Outside diameter: 3.031 in.
• Shaft diameter: 2.176 in.
• SKF design and manufacturing standards focused on long service life

Application Details

This SKF transmission seal is built for vehicles equipped with MP1225 and MP1226 transfer cases where noted. It fits 2007-2015 Chevrolet Silverado 2500 HD, rear; 2007-2015 GMC Sierra 2500 HD, rear; 2008-2013 Cadillac Escalade, rear; 2008-2013 Cadillac Escalade ESV, rear; 2008-2013 Cadillac Escalade EXT, rear; 2010-2013 Chevrolet Express 2500, rear; 2010-2013 Chevrolet Express 3500, rear; 2009-2013 Chevrolet Suburban 2500, rear; 2010-2013 GMC Savana 2500, rear; 2010-2013 GMC Savana 3500, rear; 2009-2013 GMC Yukon XL 2500, rear; 2007-2011 Chevrolet Silverado 3500 HD, rear; and 2007-2011 GMC Sierra 3500 HD, rear. It also fits 2007-2013 Chevrolet Silverado 2500 HD, rear; 2007-2013 GMC Sierra 2500 HD, rear; 2008-2013 Cadillac Escalade, rear; 2008-2013 Cadillac Escalade ESV, rear; 2008-2013 Cadillac Escalade EXT, rear; 2010-2013 Chevrolet Express 2500, rear; 2010-2013 Chevrolet Express 3500, rear; 2009-2013 Chevrolet Suburban 2500, rear; 2010-2013 GMC Savana 2500, rear; 2010-2013 GMC Savana 3500, rear; 2009-2013 GMC Yukon XL 2500, rear; 2007-2011 Chevrolet Silverado 3500 HD, rear; and 2007-2011 GMC Sierra 3500 HD, rear.

This part cross-references 24226707 for the same application.

Common Issues This Seal Can Address

• Transmission or transfer case fluid seepage at the rear seal area
• Contamination entering the sealed shaft interface
• Wear-related leakage from an aging seal lip
• Service replacement for a damaged or hardened seal
• Fitment correction during transfer case or transmission repair

Installation Notes and Tips

Verify shaft diameter, outside diameter, and width before installation to confirm the seal matches the service opening. Inspect the shaft and sealing surface for scoring, corrosion, or debris, and clean the bore thoroughly before pressing the seal into place. Use care to keep the sealing lip aligned during installation so the polyacrylate surface seats evenly.

Quality Assurance

SKF has a long history in seal engineering, including early integrated shaft seal development and continued refinement of bonding and material techniques. SKF 21768 is manufactured to support consistent sealing performance and durability in demanding drivetrain service.