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Bumpiness Under Heavy Acceleration

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    #1

    Bumpiness Under Heavy Acceleration

    Hello all,

    I have noticed a crisp bumpiness that appears when I am accelerating quickly, most noticeably in first gear, but sometimes in second as well. It feels as if it is coming from the rear of the car. I have also noticed some bumps as higher speeds under even slight acceleration. Could this be a CV joint issue or a differential issue?

    Thank you
    Tags: None
    #2
    Bad drive shaft?

    When the center support bearing dies, the shaft hits the trans tunnel during accel, but balances out at speed.

    But it could be a lot of things, put a hand on everything to see what has play.
    87 'vert~~~~~~~89 s50~~~~~~~~~91 318i~~~~~~~~87 s50~~~~~~~~~R.I.P. '91 318i

    I Need used SIR tools

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      #3
      Could be CSB, could be driveshaft u-joints, could be halfshaft CV joints, etc.
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        #4
        In my experience it was a tire with a broken belt. Tires themselves looked fine.

        Could be CSB though.
        20% Accurate

        Morty: Well Summer maybe people that create things aren’t concerned with your delicate sensibilities you know? Maybe the species that communicate with each other through a filter of your comfort are less evolved that the ones that just communicate? Maybe your problems are your own to deal with and maybe the public giving a shit about your feelings is a one way ticket to extinction.

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