Ford F-350 wont go into 4x4, any idea what it could be?

Q

quad man 350 and 700

New member
The 4 wheel drive on my 2004 f-350 wont work I had to plow today with only 2 wheels, which sucked. The 4x4 light is on and the front excel is moving maybe the hubs arnt locking but i keep moving them front and back and switching them but the front wheels will not spin, so any ideas what it could be and how much it would cost to fix??? Your answers are greatly appreciated, I love my truck and take the best care of it.
 
If you have just one front hub that is not locking, neither wheel will turn, even if the front driveshaft is being propelled. (All that power is wasting away at the unlocked hub). Jack up the front of the truck, with it in 4wd, and check to see if one of the hubs is not locking... Also, I'm not sure if you have it, but many newer model ford trucks have vacuum hoses going to the front hubs, and I've "heard" that if these are damaged, it can cause problems
 
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