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4WD Vacuum Actuator

The 4WD vacuum actuators on Ford’s Electronic Shift-on-the-Fly system engage the axles with vacuum-operated diaphragms.

View Full Product Listing http://ecatalog.smpcorp.com/TEC/#/searchparts/searchText/Four Wheel Drive (4WD) Actuator?type=p

Think TechSmart First: Direct Replacement

The Problem: When the vacuum-operated diaphragms rot or tear, the OE actuators will fail, the hub will stop engaging, and the vehicle will be stuck in 2WD mode.

Our Response: TechSmart's 4WD Vacuum Actuator helps you restore 4WD function to Ford and Lincoln trucks. It's a direct replacement for the failed OE part, which means you'll have an easier install. In total, TechSmart's part covers more than 3.3 million VIO.