What does the front axle actuator do?
The Axle Actuator is a device which activates the front axle when the driver switches from 2 wheel drive to 4 wheel drive. When the switch is turned on, the control module turns on an air-pump which is mounted near the front of the car. The pump begins to build pressure and eventually opens a relief valve.
How do you test front axle actuator?
To test yours, simply disconnect the wiring to it and remove it from the front axle by unscrewing it. Reconnect the wiring and engage the four wheel drive, the actuator should extend. If it does not and the wiring is ok, the likely fault is the actuator.
How much is a 4×4 actuator?
The cost of a 4WD actuator varies between different makes and models. An OE replacement 4WD actuator can cost as low as $40 for an individual piece. This part is also sold in sets of two priced anywhere between $100 to $400.
Do front CV axles turn in 2wd?
The front axles do spin any time the truck is rolling, the disconnect is on the pass side of the front axle (vacuum activated). When in 2wd, the transfer case does not apply power to the front drive shaft, and the passenger side axle is not connected to the front diff.
How do you know if your 4 wheel drive is engaged?
If the 4-wheel drive is engaged, the driver will feel the left and right wheels bind up while driving. The bucking or lurching motion of the car is normal and indicates the front end is under power. The vehicle will become a little bit stiffer when turning.
How do you diagnose a 4WD problem?
Common 4WD problem symptoms:
- decreased traction in snow or mud.
- rattling noise when 4WD engaged.
- “Service 4WD” indicator light is on.
- can’t disengage 4WD (4WD light on).
- excessive front tire wear (4WD won’t disengage)
- excessive fuel consumption (4WD won’t disengage)
- lack of power (4WD won’t disengage)
What is an actuator for 4 wheel drive?
4WD Actuator allows you to engage or disengage the four-wheel drive feature of your vehicle. This actuator is either vacuum operated or electronic, and take the place of manual locking hubs. When you engage your four-wheel drive, the transfer case shifts to also drive the front wheels.
Is an actuator?
An actuator is a device that uses a form of power to convert a control signal into mechanical motion. Industrial plants use actuators to operate valves, dampers, fluid couplings, and other devices used in industrial process control. The industrial actuator can use air, hydraulic fluid, or electricity for motive power.
Why does my 4WD light stay on?
If it stays on, or the “Service 4WD System” message is displayed, there is a problem with the 4WD system. Fault code(s) should be stored in the transfer case control module and must be read with a scan tool. Properly diagnosing and repairing any problems found should restore the system to proper operation.