4Runner Front Differential Vacuum Actuator 41400-35034

This is the complete front differential actuator assembly for Toyota trucks with the vacuum-shifted front axle disconnect: housing, internal shift fork, position switch and connector, ready to bolt to the side of the front differential. It replaces OEM 41400-35034 (aftermarket cross-references 600-488, J78005, SAT017).

Fitment: 4Runner 2005-2019 4.0L V6, 4Runner 2005-2009 4.7L V8, 4Runner 2010 2.7L, FJ Cruiser 2007-2014 4.0L, Tacoma 2005-2019 2.7L, Tacoma 2005-2015 4.0L V6 and Tacoma 2016-2019 3.5L V6. 4WD models only. Confirm the OEM number on your old unit before ordering.

The classic failure is the transfer case shifting into 4H, the 4WD indicator flashing, and the front wheels never picking up drive. The diaphragm inside the original actuator cracks or the switch corrodes, so the fork never slides the clutch sleeve over to lock the axle. Before you condemn it, check the vacuum lines and VSV under the hood; if vacuum reaches the actuator and the fork still will not move, the actuator is done.

Install is a few bolts and the vacuum hoses on the side of the diff housing. Clean the mating surface, use a thin bead of FIPG where the old gasket sealed, line up the fork with the sleeve groove, and torque the bolts evenly. Top up the front diff gear oil afterward, since some always comes out when the old unit is pulled.