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163 0206 4x4 Eng02 Z

A front axle disconnect system slides a collar (arrow) over two parts of the axle shaft so that both front wheels are driven. The collar may be powered by heat, electricity, vacuum, or hydraulics. This is a Toyota ADD system.
Four-Wheel Drive

A front axle disconnect system slides a collar (arrow) over two parts of the axle shaft so that both front wheels are driven. The collar may be powered by heat, electricity, vacuum, or hydraulics. This is a Toyota ADD system.  Related Article