Vibration/Rumble only at certain speed

Discussion in 'General Motoring' started by naverillsn001, Jun 27, 2005.

  1. My 1984 240 DL wagon recently started vibrating/shuddering like crazy, but
    ONLY between 40 and 50 mph -- keep below 40, or above 50, and it's smooth.
    The vibration stops, even between 40-50, if I take my foot off the gas. The
    rumble sounds from the rear.

    My best guess is out-of-round tire. I recently had a tranny rebuld and an
    alignment (but all was fine for a few weeks after each repair). Anything
    to consider other than bad tire?
    naverillsn001, Jun 27, 2005
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  2. naverillsn001

    Gary Heston Guest

    Could be a drive shaft imbalance--presumably, the shop knew to keep the
    two pieces of the drive shaft aligned.

    Check the support and support bearing as well.

    Gary Heston, Jun 28, 2005
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  3. naverillsn001

    James Sweet Guest

    Check the U joints on the driveshaft, my brother's 240 started doing that
    and one of the joints had lost it's needle bearing completely.
    James Sweet, Jun 28, 2005
  4. Thanks very much, folks. My Volvo guy replaced my U-joint ($120), and all
    is well.

    You good folks saved me from buying tires for nothing. :)

    Thanks again.
    naverillsn001, Jul 5, 2005
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