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    vibration issue remains

    just an update on my vibration issue at speeds in the 200 Km/h range.

    i had balanced the rear wheels and thought it was gone. however, sometimes it still returns. vibration in the back.

    anyone else notice something like it ? any clues as to waht it can be ?

    maybe i should rebalance the wheels at another shop ?

    could anything else be causing this ?

    as said its only there in the 200- 230 km/h range.

    problem is also that its not that easy to maintain these high speed for lengthy periods to locate the exact speed zone where it occurs.

    however, below these speeds everythingis fine, therefore i doubt it would be drivetrain related

    Re: vibration issue remains

    200km/h is not a high speed for this car. Something is very wrong with your wheels' balance or something else.

    Re: vibration issue remains

    When you feel the vibration do you listen for any faint high pitched whine like noise?

    If you can hear that it could be one of your rear wheel bearings.

    With no noise developing, it could be bad PASM unit, Spring Perch loose, or a motor mount.

    Re: vibration issue remains

    Quote:
    JimFlat6 said:
    When you feel the vibration do you listen for any faint high pitched whine like noise?

    If you can hear that it could be one of your rear wheel bearings.

    With no noise developing, it could be bad PASM unit, Spring Perch loose, or a motor mount.




    hey jim,

    thanks for your reply.
    actually there is no noise. only a shudder which i feel comes from the rear.

    Re: vibration issue remains

    As Jim said it is either(my guess):
    -motor mount
    -bad rear wheel

    or

    -gearbox issue(I truly hope not!)

    Re: vibration issue remains

    just rebalance and secure your wheel balance weights with some duct tape

    Re: vibration issue remains

    Quote:
    intouch1 said:
    just an update on my vibration issue at speeds in the 200 Km/h range.

    i had balanced the rear wheels and thought it was gone. however, sometimes it still returns. vibration in the back.

    anyone else notice something like it ? any clues as to waht it can be ?

    maybe i should rebalance the wheels at another shop ?

    could anything else be causing this ?

    as said its only there in the 200- 230 km/h range.

    problem is also that its not that easy to maintain these high speed for lengthy periods to locate the exact speed zone where it occurs.

    however, below these speeds everythingis fine, therefore i doubt it would be drivetrain related



    Could this have anything to do with your previous power braking launch tests? just wondering .

     
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