2003 Tahoe front end howling

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Don_Juan

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May 26, 2013
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A few months ago my Service 4wd light came on. It has since gone off and has not come back (this may not be connected to my issue). I think around this time I noticed a sound in the front end while I was driving, like I have mud tires. I have regular passenger tires. It starts at about 15 mph and over. The noise seems to be consistent, coasting, accelerating, etc. I can hear it inside the cab on driver's side, not really on the passenger's side. Turning or braking does not change the noise. It goes into 4 HI and 4 Low no problems. I can hear it clunk when it engages and disengages. I've read it may need a transfer or diff case rebuild or wheel bearings. It has about 130k miles. Ideas? I don't have a lot of $ to fix it.

5/27/13
I went under it today with a flashlight looking more carefully and for leaks from any seals; CV, transfer case, etc. No obvious leaks. Going to jack up the front tomorrow and see if I can tell if it's a wheel bearing/hub. Can low fluid in the diff or transfer case cause noise? I need to check or change those too. Anyone have an idea what is causing my problem?
 
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mukmuk

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A few months ago my Service 4wd light came on. It has since gone off and has not come back (this may not be connected to my issue). I think around this time I noticed a sound in the front end while I was driving, like I have mud tires. I have regular passenger tires. It starts at about 15 mph and over. The noise seems to be consistent, coasting, accelerating, etc. I can hear it inside the cab on driver's side, not really on the passenger's side. Turning or braking does not change the noise. It goes into 4 HI and 4 Low no problems. I can hear it clunk when it engages and disengages. I've read it may need a transfer or diff case rebuild or wheel bearings. It has about 130k miles. Ideas? I don't have a lot of $ to fix it.

5/27/13
I went under it today with a flashlight looking more carefully and for leaks from any seals; CV, transfer case, etc. No obvious leaks. Going to jack up the front tomorrow and see if I can tell if it's a wheel bearing/hub. Can low fluid in the diff or transfer case cause noise? I need to check or change those too. Anyone have an idea what is causing my problem?

my apologies for bumping an old thread... i'm sure it wasn't your tires... did you ever find out what the "howling" was/is? i have 2005 Tahoe that has a similar sound, replaced both wheel hub bearings and it's still there... it does it in all gears, 4wd and neutral... let me know if you discovered the problem...

-Mike
 
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