Toyota Tacoma Front Differential Vacuum Actuator 41400-34013

This is the vacuum actuator that engages the front axle on Toyota 4WD trucks with the automatic disconnecting differential (ADD). It replaces OE 41400-34013 and Dorman 600-410.

Fitment: 2000-2004 Tacoma 2.7L and 3.4L 4WD, 2000-2002 4Runner 3.4L 4WD, 2000-2004 Tundra 3.4L 4WD, 2000-2006 Tundra 4.7L 4WD, and 2001-2007 Sequoia 4.7L 4WD.

When the actuator diaphragm tears, the transfer case shifts into 4WD but the front wheels never pull, the 4WD light keeps flashing, or you hear grinding from the front axle as the collar tries to engage. Before replacing it, check the vacuum lines and the VSV at the firewall. If vacuum is reaching the actuator and it still will not hold, unbolt it from the differential housing, bolt the new unit in with the shift fork lined up, and hook up both vacuum lines.