The internal diaphragm on certain Ford and Lincoln vacuum-activated hub actuators is highly failure-prone. This patented Dorman OE FIX replacement restores 4WD while eliminating the problematic original functions for greater reliability. Product Features:Dependable solution - this unique hub locking actuator delete enables 4WD operation while disabling the failure-prone original vacuum functionCost-effective fix - deleting need for troublesome vacuum saves future replacement cost and frustrationPatented design - exclusively engineered in the United States by highly trained automotive expertsFully reversible - actuator includes vacuum caps for holding remnant lines and allow for restoring original function in future
