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Drivetrain Noise

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Old Feb 13, 2004 | 11:34 AM
  #1  
gh1051's Avatar
gh1051
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From: So. Ca.
Drivetrain Noise

My 98 XLT 4wd has a noise that sound just like worn break pads.
I replaced the front rotors and pads expecting to cure the problem but the noise is still there. I know it has something to do with the drivetrain because the frequency changes with speed not RPM. The rear pads/rotors are fine, I had them replaced last year. I have 150,000+ miles and need to get many more.
 
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Old Feb 13, 2004 | 11:51 AM
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Check the diffs and transfer case... the fluids should probably be changed if they have not been done in a while.
 
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Old Feb 13, 2004 | 12:01 PM
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vette599
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It could be front wheel bearing.I just had mine replaced yesterday.IF the sound changes when you turn the steering wheel as you are driving,it's a good indication of the bearing.This comes as a hub assembly with bearing and abs sensor on the 4x4's.The noise started around 35mph and was real loud at arouind45mph.
Hope this helps.Good luck.
 
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Old Feb 13, 2004 | 01:41 PM
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gh1051
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I wonder if the parking brakes are rubbing? (rear disks).
 
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Old Feb 13, 2004 | 05:46 PM
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I can't remember if the '98 had a mechanism for disengaging the front drivetrain, but I almost don't think so. You might check the CV joints on the axleshafts and the u-joints on the driveshaft.
 
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Old Feb 15, 2004 | 05:54 AM
  #6  
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I've heard of this noise on 4x4 Rangers with the vaccum hub system; it was a front wheel bearing. vette599 is correct, it is bought as an assembly.
 
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