Noise / vibration at 45 MPH when cruising
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Cadillac Escalade, EXT and ESV Forum - 1999 - 2006 Discussion, Noise / vibration at 45 MPH when cruising in Cadillac Escalade Forums; Hi, My truck makes a medium low pitched, kind of growling noise with the foot on the gas pedal. It's ...
  1. #1
    axe
    axe is offline Cadillac Owners Member
    Automobile(s): 99 Seville STS, 94 Fleetwood Brougham, 02 Escalade
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    Noise / vibration at 45 MPH when cruising

    Hi,

    My truck makes a medium low pitched, kind of growling noise with the foot on the gas pedal. It's not noticeable below 40 MPH and it seems to disappear at about 70 MPH, though it's harder to tell since it might be drowning in other noises. When I let go of the gas pedal or accelerate hard the noise and vibration is gone.

    It kind of sounds like driving with bad snow tires and the slight vibration/buzzing can be felt in the steering wheel.

    I have replaced the fluid in the front/rear diff and the transfer case, this did not make any perceivable difference. Also going to replace the tranny fluid.

    I pray for it not being the front diff bearing(s). Could it simply be a bad wheel hub or would that also make noise when coasting? I checked for play at the front wheels but they seemed tight, although I have heard that a hub could be bad even if it "feels" tight.


    Thanks!
    Fred

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  3. #2
    the cadillac man's Avatar
    the cadillac man is offline Cadillac Owners Master
    Automobile(s): 03 cadillac escalade
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    Quote Originally Posted by axe
    Hi, My truck makes a medium low pitched, kind of growling noise with the foot on the gas pedal. It's not noticeable below 40 MPH and it seems to disappear at about 70 MPH, though it's harder to tell since it might be drowning in other noises. When I let go of the gas pedal or accelerate hard the noise and vibration is gone. It kind of sounds like driving with bad snow tires and the slight vibration/buzzing can be felt in the steering wheel. I have replaced the fluid in the front/rear diff and the transfer case, this did not make any perceivable difference. Also going to replace the tranny fluid. I pray for it not being the front diff bearing(s). Could it simply be a bad wheel hub or would that also make noise when coasting? I checked for play at the front wheels but they seemed tight, although I have heard that a hub could be bad even if it "feels" tight. Thanks! Fred
    Does the noise go away when making turns?

    If yes then it is a wheel bearing

    If no then it is a different bearing maybe a u joint somewhere in the drive train

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