when not in 4 wheel drive, there is an intermitting buzzing sound coming from the front of the vehicle... once in a while it also makes some intermitting quick grinding noise when in reverse.

If i place the truck in to 4-wheel drive the sound obviously goes away.

any ideas if this is a major 4 wheel drive issue of not fully releasing?

 

Here we go again:

https://www.f150forum.com/search.php?searchid=2536881

 

http://www.ford-trucks.com/forums/836438-everything-you-wanted-to-know-about-the-iwe-system-and-then-some.html

http://www.f150online.com/forums/2004-2008-f-150/360269-iwes-removal-replacing.html

 

Thank you!! guess i should have done some research on the site... easy fix..

 

if you fix this soon enough, it is POTENTIALLY an easy fix. to swap an IWE solenoid is very simple..... if you have a bad IWE actuator, its a little more involved, and cost more. but, if you wait to long, you could need a new hub, which obviously cost even more.

i would recommend getting a vacuum tester (cost about 10-15.00), and test the actuators for leak down. very easy to do, and will tell you right where the problem is.