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Posted on Jan 02, 2017
Hi, on the front axle is the actuator for the free wheel hub. This actuator works with vacuum. You will need to establish if you have sufficient vacuum on the actuator. You should have vacuum on one side of the actuator in 4x2 mode and then the vacuum should change to the other side when 4x4 mode is selected. If your vacuum is fine and the actuator moves far enough, then you should look at the freewheel sensor situated on the front diff. The sensor might be faulty which gives the control unit the wrong info.
Posted on Oct 06, 2009
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