Strange 4x4 issue.. - Ford Powerstroke Diesel Forum
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Old 01-12-2014, 05:26 PM Rookie

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Strange 4x4 issue..

For the last month or so, I've been trying to find the source of a clanking noise when 4x4 is engaged. I have replaced the milemarker manual hubs, which I thought had to be the cause of the problem. Wrong. The front drive shaft turns fine, and the clanking noise will occur in 4x4 low, hubs locked or unlocked and also in 4x4 high, locked or unlocked hubs. As long as its in 4wheel, it will clank and the noise will get faster as the truck picks up speed. Does not happen in 2wd.
Can someone point me in the right direction? Ive been told its an "front axle shaft bearing" but my u-joints and axle ends seem to have a little play.. Any help is appreciated.

Edit: The front wheels will go through a HARD 10+ second vibration after hitting a reflector in the road or similar bump. Definitely not normal, seems to be from same source. Wheel bearings and ball joints checked out as good by a pry test at home and confirmed to be good by my mechanic.
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Old 07-21-2014, 06:31 PM
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The cv axle is bad in the front driveshaft
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