When selected 4×4 not engaging the front wheels

180,000 MILES • 5.4L • 4WD • AUTOMATIC
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CODY123123
  • MEMBER
  • 1 POST
I turn the switch for 4×4 hi and lo the lights on the dash board come on but it will not engage the front wheels
Apr 3, 2019 at 2:39 PM
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JOETECHPRO
  • ✓Experienced Mechanic
  • 705 POSTS
Hey Cody123123,

A quick check for this is to see whether you are getting actuation from the front wheel/axle locking system or IWE's.

Jack up the front of the vehicle.

With the vehicle in park, park brake on.

Start the engine and switch the 4x4 to 4H

Turn the front wheels by hand and whilst watching the front axle shafts, do the axle shafts spin when you turn the front wheels? You will need to spin the wheels slowly by hand a few times as the IWE's may not mesh straight away until the wheel turns and the splines line up.

If when 4H is selected the front wheels spin independently of the front axle shafts then the IWE's are not locking the wheel to the axle.

Let me know how you go with this test.

Regards, Joe
Apr 12, 2021 at 3:45 AM
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