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  1. #1

    Default 1990 suburban sle Vibration

    Hello all. I just bought a 1990 gmc suburban sle, 5.7 4wd auto. My problem Im having is at about 25 mph I am getting a good vibration, it lasts til about 35 mph, then smooths out, at 45 starts again and seems to just stay there , whats strange to me is it seems to be tied in with how much throttle Im giving it, if Im easy on the gas it seems that the vibration is less, if im in the gas, the worse the vibration, but none the less it smooths out. I have checked the U joints, tranny mount,engine mounts, they all seem fine, the only thing I have found so far are few uneven tread wear patterns on the rear tires, but they arent extreme, the differential angle is not extreme, has stock suspension, Im just not sure what it is, it has 31/10.5/15s on it, baja somethings,lol, im just wondering if anyone has had a issue like this, what puzzles me is it smooths out, then all of a sudden vibration ,any help is appreciated.

  2. #2

    Default

    Usually an unbalanced wheel will shake at low speed, go away, and come back at a higher speed. Try balancing the wheels.
    Jim

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows



    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  3. #3

    Default

    i would have to agree start with a wheel balance it can make a huge difference

    2003 Z71 Silverado LS
    Access roll up cover
    Bed Rails
    Billet Grill insert
    Bed Rug
    CB with PA system
    Waiting to be installed
    Two 8in RF HX2 punch( would have 12s but they got stolen)

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