Vibration and Hum above 20mph



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Thread: Vibration and Hum above 20mph

  1. #1
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    Exclamation Vibration and Hum above 20mph

    So I have been doing the sway bar bushings and end links to fix the front end noise (pop). Replaced with Moog bushings and end links. I am now trying to identify a hum/vibration that starts about 30 mph and gets worse when I turn the wheel to the right. The vibration disappears when I turn the wheel to the left while driving. I do not feel any vibration under 20mph even if I turn the wheel left or right. I rechecked the suspension and all is tight. While troubleshooting I pulled one side of the end link off to see if the vibration and hum went away. This I did to one side then the other. Did not make the vibration/Hum go away. The hum sounds like tire noise. The tires have 5k miles on them. All tires look good no uneven wear. I don't think the problem is caused by the tires since turning the wheel to the left causes the noise and vibration to disapear. I shifted the trans into neutral and this did not change the vibration/hum. I pulled the brakes off both sides and checked them for any sign of uneven wear, none found. I only have 5k miles on the brakes (new rotors and pads). No vibration when braking but the hum is still there. I checked the rotor temp with a IR heat gun. Both temps are within 10 degrees of each other. I am starting to think the problem is the drivers side wheel bearing. When turning right it loads the drivers side wheel bearing. Hope to find someone who has had this problem and was able to identify the cause.

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    It's not exact, but it's similar symptoms to my stratus when it's driver side bearing started going.
    How many miles ya got on that van?
    2005 Kia Sorento LX 4x4 44,000mi
    2003 Chrysler T&C Limited 3.8l AWD 145,000mi Traded in 9/14/11
    2000 Dodge Stratus ES v6 179,000 sold 7/2011

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    Quote Originally Posted by ratsttam View Post
    It's not exact, but it's similar symptoms to my stratus when it's driver side bearing started going.
    How many miles ya got on that van?
    I agree with the drivers side bearing. Turning right puts more load on the left bearing and opposite for the passenger side. A good way to tell if a bearing is bad.
    Candy the van. '98 Sport 3.8L 132,200 miles. Used trans at ~96k. Great piece of my life and a fine van.

    '69 GTO drop top
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    I concur with above (wheel bearing)
    If you want to eliminate tires, do a full tire rotation (rears to front and fronts to opposite sides on rear...) - if that does not change anything, it's gotta be the bearing..
    relevant vehicle: '05 -=C=- T&C Ltd @~110K

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    Ditto. Does speed make it louder and worse? If it is a bearing I would think that going faster and turning would make a bearing noise worse.
    2005 T&C Ltd 3.8 69k
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    Quote Originally Posted by 2ez24get View Post
    ...The hum sounds like tire noise. The tires have 5k miles on them. All tires look good no uneven wear. I don't think the problem is caused by the tires since turning the wheel to the left causes the noise and vibration to disapear...

    I would think that turning the wheel to the left causing the noise and vibration to disappear would specifically NOT eliminate tires as a possible cause.

    My bet would be you have a bad tire, and it may still be under warranty. Rather than doing a full rotation, you could try replacing each front tire with the spare and then driving, to eliminate a bad tire as the cause. Then if it's a bad tire, if you bought the tires, you should be able to get it replaced.
    Michael
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    1988 Dodge Caravan SE, 2.5L I4 (1988-1995, 99K mi); 1995 Plymouth Grand Voyager SE "Rallye", 3.3L (1995-2004, 169K mi); 2003 Grand Caravan Sport, 3.8L, (2004-2008, 106K mi), 2008 Nissan Quest, (2008-2010, 25K mi)

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    Replaced the left wheel bearing. No more Vibration/Hum. Problem solved.

    6 months ago I had replaced the left front wheel bearing when I broke two studs off. Should have kept the OEM hub and replaced the two studs instead. I will take the Autozone hub back to get a warranty swap.
    2004 Town & Country Limited
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    Quote Originally Posted by 2ez24get View Post
    Replaced the left wheel bearing. No more Vibration/Hum. Problem solved.

    6 months ago I had replaced the left front wheel bearing when I broke two studs off. Should have kept the OEM hub and replaced the two studs instead. I will take the Autozone hub back to get a warranty swap.
    Yeah I kill my replacements every 1.5 years or so. I have a feeling the front passenger side has little life left as it is getting an occasional squeak and I had to tighten it up a few months ago. I'll have to see if its loose again.
    Candy the van. '98 Sport 3.8L 132,200 miles. Used trans at ~96k. Great piece of my life and a fine van.

    '69 GTO drop top
    www.facebook.com/people/Andy-Greif/1410438927

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