1998 Ford Explorer Vehicle making Unfamilure noise

1998 FORD EXPLORER
139,000 MILES • 6 CYL • 4WD • AUTOMATIC
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SHADOW_HUSKER
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When i am driving Periodicly u will hear a sound that sounds like someone is sticking a pencil into a fan blade. It does it most noticeably at around 30 M.P.H and above. When it does make this noise it may last a second or it may last 15 seconds or more. I have taken it to some local mechanic's and none have heard a noise like this, At first i thought it was the drive shaft, but that is tight and appears to be fine. the last shop i toook it to thinks it may be int he transfer case or the transmission. Any one else had anything like this?
Oct 28, 2010 at 5:23 PM
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JACOBANDNICKOLAS
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Does the sound seem to come from under the vehicle or under the hood?
Oct 28, 2010 at 8:35 PM
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SHADOW_HUSKER
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Under the vehicle, when driving it sounds like it is in the center under the vehicle.
Oct 28, 2010 at 8:41 PM
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JACOBANDNICKOLAS
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Have you checked the splines on the driveshaft yoke? Also, did they check u-joints? Is there any chance the 4wd could be trying to to engage.
Oct 28, 2010 at 9:18 PM
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SHADOW_HUSKER
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the Shop i took it too, Said they checked both the drive shaft and U joint's. they said both were tight, I had some other people tell me to have those checked as well, As for the 4 wheel drive i,m not sure on this. it is Auto 4 wheel drive at all times then can be switched from 4 high to 4 low. Another thing I remember is back In june or July i was driving at about 25 m.p.h when i heard a squeel and a pop/thud from underneith the truck, I immedietly pulled over but found nothing wrong. after that it was a few weeks before I statred hearing this sound
Oct 29, 2010 at 5:33 AM
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JACOBANDNICKOLAS
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This is a tough one. Based on your description and what the shops have checked, something tells me it is in the transfer case.
Oct 29, 2010 at 7:04 AM