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Groaning & humming 2003

2K views 0 replies 0 participants last post by  expyhawk 
G
#1 ·
I have read about the front end groaning & humming. My 2003 Expedition had these noises and a grinding when I lock into AWD & 4WD. I took it to my dealer and they replaced the hubs. To no avail, I still have the humming and grinding. Has anyone else had these problems? What is it? What can I do?
 
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