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Odd 4x4 noises

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Old Dec 22, 2011 | 11:00 PM
  #1  
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turnkyle
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From: Heber, UT
Odd 4x4 noises

I have a 94 f150 with the e4od and the 5.8. Yesterday it started to snow like crazy all day and the roads were slicker than snot by the time I got off work. So I ran it in 4 wheel drive on the way home and every time I would get it over 50 you could hear a vibration that sounds like it's coming from the drivers front wheel. It sounds really bad when you are off the gas slowing down from 45 to 40 mph. It sounds like when you spin a wheel really fast on a toy car, kind of a growly vibration noise. I've never had a 4x4 system so noisy before any ideas?

Oh yeah, it has the auto hubs on it as well. I was going to crawl under it and make sure there are no bad u-joints on the drive line or half shafts. What else should I look at?
 
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Old Dec 23, 2011 | 09:52 PM
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The auto hubs are notorious for failing, one might not have locked.
 
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Old Dec 23, 2011 | 09:57 PM
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The front axle u-joints often dry out and seize up on these trucks, I suggest you completely dismantle the front axle and replace all these joints and then grease them regularly.
 
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Old Dec 24, 2011 | 09:21 AM
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If it's a bad u-joint on one of the axle shafts its going to have to wait till summer. It's not bad enough to tear the front end completely apart in the snow below freezing! how can you tell if an auto hub is going bad?
 
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Old Dec 24, 2011 | 10:54 AM
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The hubs generally work(lock) or they don't work and when they don't you'll know right away because there won't be any power getting to the front wheels... even if only 1 hub is bad.
 
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Old Dec 24, 2011 | 11:32 AM
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Check out the front driveshaft. A bad front u-joint, or damaged/out of balance driveshaft will manifest itself as a vibration as described...
 
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Old Dec 24, 2011 | 12:17 PM
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The four wheel drive works so I would assume the hubs are good. I will have to check my u-joints, just need to work up the desire to go lay in the snow. Haha
 
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