Axle Installer, Shaft Seal, Correctly Installs The Seal Onto The Axle Shaft and Into The Wheel Knuckle, Preventing Front Hub Vacuum Leaks That Would Cause The 4wd To Not Engage, For Use With Works On 2005-Newer Ford F-250, F-350, 4x4s Having The Vacuum-operated Front Axle, Number of Pieces 1, Includes Ford Axle Shaft Seal Installer