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Old 08-29-2007, 10:35 AM
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Unhappy Help - Loud Noise

I have a 2003 Excursion PSD 7.3 4x4. My problems is that when I reach about 40 mph thru 60 mph. It gets obnoxiously loud inside. It really hurts your ears. At first I thought it was in need of a tire rotation and balance but that didn't work. Today I had the wheels aligned but that did not work. I don't know what to do now. The noise does not happen when I am below 40 and above 60. The noise is much like when a window is down and you are driving down the road and it hurts your ears. Back a few months ago I hear some squeaking when backing up, I was thinking it came from the rear differential drive shaft bearing but it stopped. Does someone have advice?
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Old 08-29-2007, 10:53 AM
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I dont have a clue man... is the engine loud are the tires loud.. u know ect ect.. elaborate. doe anything sound broken? is performance affected?
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Old 08-29-2007, 11:00 AM
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If it was something in the driveline I would think you would have a vibration as well as the noise. Is it a highpitched squeak, constant whistle, need more info before I can help you out.
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Old 08-29-2007, 11:03 AM
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No performance issues, no real loss of fuel milage. I looked at the tires there is some where on the inside but the shocks are good and I had a wheel alignment. It is not the engine, I know that for sure. It has to do with something being out of balance or something - It is the only thing I can think off. I am pretty good with engines so I know it is not that.

My guess, wheel, chasis, differential, transfer. - Only thing I can think of. I am stumped on this one. It started after I took it camping and was going over "wash-board dirt roads".
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Old 08-29-2007, 11:04 AM
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It is not high pitched, more of a low vibration sound but you don't feel the vibration perse, but you can definately hear it.
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Old 08-29-2007, 11:04 AM
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maybe rotate your tires... uhhhhh... balanced again maybe. maybe u knocked something those on the washboards. they can be pretty rough.
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Old 08-29-2007, 11:06 AM
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Quote:
Originally Posted by scott82070 View Post
It is not high pitched, more of a low vibration sound but you don't feel the vibration perse, but you can definately hear it.
Check your U-joints on the rear driveshaft and check the carrier bearing ( driveshaft bearing). As those maybe getting wore out and this sounds like the early signs of failure.
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Old 08-29-2007, 11:08 AM
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yeah. what he said. lol I dont know man. I dont know how to fix things until they break. When they do... it doesnt bother me as long as its close to home
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Old 08-29-2007, 11:12 AM
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Also check your wheelbearings on your front axle as well.
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Old 08-29-2007, 11:17 AM
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I had heard squeaking when backing-up a couple months back coming from the rear differential. If the U-joint could cause this. I think I will start there. Seems to be a reasonable place to start. Thank you guys for your help.

By the way Big Country - Thanks for your service to the Country - my brother is in Iraq right now.
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