wadsworthtg

Ok want to say I tried the search but still confused here is what I have tried and know.

1.) Not a soleniod problem have the 2008 f150 with new solenoid they added cover to.
2.) I have jacked front end up with key on i hear 4x4 engage when selected spin wheels turn opposite directions and cant spin front drive shaft by hand.
3.) 4x4 low works fine in 4x4 hi loud grinding so I am afraid to do this untill I think problem solved.
4.) took off vaccum at solenoid behind battery can blow through it just fine so i believe no obstruction and its hard to suck on lol.
5.) this all started with a poping sound coming from front end I should add about a few months ago when in 4x4 hi

I hope someone can point me in the right direction here. AT this point about to go pay the dang dealer for a truck just out of warranty

RahX

Might have a bad front CV

Jimmccrank

Sounds like the auto locking hub assembly is bad. I have read other reports and this appears to be a common problem.
Jim

60DRB

Read through this and see if it helps...

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

wadsworthtg

ok no vacumm at double lines off the wheel behind the steering knuckle my question is what is the actuator i guess this is bad is this the same thing as the iwe solenoid if not where is it located

60DRB

If the IWE[s] are bad, they are on the inner side of the wheel hubs. They aren't too hard to replace. This thread has pictures...

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