National 710664 Transfer Case Input Shaft Seal

Transfer Case Input Shaft Seal for 4WD Applications

The National 710664 transfer case input shaft seal is an oil seal built for transfer case service in a wide range of Ford, Lincoln, Chevrolet, GMC, and Cadillac 4WD applications. It uses polyacrylate sealing material and precise dimensions to help maintain a tight seal at the input shaft and housing bore.

• Part type: transfer case input shaft seal / oil seal
• National part number: 710664
• Sealing material: polyacrylate
• Inside diameter: 1.886 in. / 47.900 mm
• Outside diameter: 2.756 in. / 70.000 mm
• Thickness/width: 0.472 in. / 12.000 mm
• Housing bore: 2.750 in. / 69.850 mm
• Interchanges with SKF 18771

Fitment and Application Details

Compatible with transfer cases used in Ford F-150, Ford Expedition, Lincoln Navigator, Chevrolet Express 1500, GMC Savana 1500, Cadillac Escalade, and related full-time or part-time 4WD platforms. This part cross-references SKF 18771 for the same application.

• Fits 2018-2019 Ford Expedition, N/A, with Borg-Warner 4468 Transfer Case; with Part Time 4WD; 1 Speed
• Fits 2015-2016 Ford Expedition, N/A, with Borg-Warner 4468 Transfer Case; with Part Time 4WD; 1 Speed
• Fits 2018-2019 Lincoln Navigator, N/A, with Borg-Warner 4468 Transfer Case; with Part Time 4WD; 1 Speed
• Fits 2015-2016 Lincoln Navigator, N/A, with Borg-Warner 4468 Transfer Case; with Part Time 4WD; 1 Speed
• Fits 2003-2014 Chevrolet Express 1500, N/A, Full Time 4WD; with Borg-Warner 4473 Transfer Case; 1 Speed
• Fits 2007-2014 Ford Expedition, N/A, with Borg-Warner 4417 Transfer Case; with Part Time 4WD; 1 Speed
• Fits 2011-2014 Ford F-150, N/A, with Borg-Warner 4417 Transfer Case; with Part Time 4WD; 1 Speed
• Fits 2009-2014 Ford F-150, N/A, with Borg-Warner 4419 Transfer Case; with Part Time 4WD; 2 Speed
• Fits 2009-2014 Ford F-150, N/A, with Borg-Warner 4418 Transfer Case; with Part Time 4WD; 2 Speed
• Fits 2003-2014 GMC Savana 1500, N/A, Full Time 4WD; with Borg-Warner 4473 Transfer Case; 1 Speed
• Fits 2007-2014 Lincoln Navigator, N/A, with Borg-Warner 4417 Transfer Case; with Part Time 4WD; 1 Speed
• Fits 2006-2008 Lincoln Mark LT, N/A
• Fits 2003-2007 Chevrolet Suburban 1500, N/A, Full Time 4WD with Borg-Warner 4482 Transfer Case and 2 Speed
• Fits 2003-2007 Chevrolet Suburban 2500, N/A, Full Time 4WD with Borg-Warner 4482 Transfer Case and 2 Speed
• Fits 2003-2007 Chevrolet Tahoe, N/A, Full Time 4WD with Borg-Warner 4482 Transfer Case and 2 Speed
• Fits 2005-2007 Ford F-150, N/A
• Fits 1996-2002 Ford F-150, N/A
• Fits 2003-2007 GMC Yukon, N/A, Full Time 4WD with Borg-Warner 4482 Transfer Case and 2 Speed
• Fits 2003-2007 GMC Yukon XL 1500, N/A, Full Time 4WD with Borg-Warner 4482 Transfer Case and 2 Speed
• Fits 2003-2007 GMC Yukon XL 2500, N/A, Full Time 4WD with Borg-Warner 4482 Transfer Case and 2 Speed
• Fits 2003-2006 Cadillac Escalade, N/A, Full Time 4WD; with Borg-Warner 4481 Transfer Case; 1 Speed
• Fits 2003-2006 Cadillac Escalade ESV, N/A, Full Time 4WD; with Borg-Warner 4481 Transfer Case; 1 Speed
• Fits 2003-2006 Cadillac Escalade EXT, N/A, Full Time 4WD; with Borg-Warner 4481 Transfer Case; 1 Speed
• Fits 2005-2006 Chevrolet Suburban 1500, N/A, Full Time 4WD; with Borg-Warner 4481 Transfer Case; 1 Speed
• Fits 2002-2006 Ford Expedition, N/A, with Borg-Warner 4416 Transfer Case; with Part Time 4WD; 2 Speed
• Fits 2005-2006 GMC Sierra 1500, N/A, Full Time 4WD; with Borg-Warner 4481 Transfer Case; 1 Speed
• Fits 2005-2006 GMC Yukon, N/A, Full Time 4WD; with Borg-Warner 4481 Transfer Case; 1 Speed
• Fits 2003-2006 GMC Yukon XL 1500, N/A, Full Time 4WD; with Borg-Warner 4481 Transfer Case; 1 Speed
• Fits 2002-2006 Lincoln Navigator, N/A, with Borg-Warner 4416 Transfer Case; with Part Time 4WD; 2 Speed
• Fits 2003-2005 Chevrolet Express 2500, N/A, Full Time 4WD; with Borg-Warner 4473 Transfer Case; 1 Speed
• Fits 2003-2005 GMC Savana 2500, N/A, Full Time 4WD; with Borg-Warner 4473 Transfer Case; 1 Speed
• Fits 2003-2004 Ford F-150, N/A, with Borg-Warner 4416 Transfer Case; with Part Time 4WD; 2 Speed

Common Problems This Seal Can Address

• Transfer case fluid seepage at the input shaft
• Oil leakage around the housing bore
• Contamination from worn or hardened sealing surfaces
• Loss of sealing performance in high-mileage 4WD drivetrains
• Service replacement during transfer case repair or rebuild

Installation Notes

Verify transfer case model, shaft size, and housing bore before installation. Clean the sealing surface thoroughly and inspect the shaft for wear, scoring, or corrosion that could affect seal life. Confirm the application matches the Borg-Warner transfer case listed for your Ford F-150, Ford Expedition, or Lincoln Navigator before assembly.

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop sealing components for modern vehicle service. The 710664 is part of National’s 710600 series and is engineered to meet the dimensional requirements of the listed transfer case applications.