1998 Mustang GT - Strange Vibration under accel

Discussion in '96-04 - 2V Specific' started by molivo, Jan 13, 2016.

  1. molivo

    molivo New Member

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    Hello all! New member, looking forward into participating! I purchased a 1998 Mustang GT a short while ago. Its developed a highly annoying condition of vibrating under load/acceleration. It seems to "smooth" out somewhat past 3k rpm's but I think that's by virtue of the rotations being so high. Any common issues on these cars that could be the culprit?
     
  2. DropTopPony

    DropTopPony Administrator Staff Member Admin SN95 Supporter

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    Auto trans?
     
  3. blackdemon007

    blackdemon007 Active Member

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    If you haven't already done so, take a quick check for simple maintenance items: fluid levels, plugs, etc.
    Rule out the easy stuff first.

    Also, have a shop check the balance on all of your wheels - you may have lost a weight somewhere.
     
  4. molivo

    molivo New Member

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    5 speed. Just had the fluids changed and tune up done so those are ruled out. Also has brand new tires so i dont think its that. It literally only does it while accelerating, if i let my foot off the gas and im coasting it stops immediately.
     
  5. 96blak54

    96blak54 Legend

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    Harmonic dampener
     
  6. Fast Lane

    Fast Lane New Member

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    U joints
     
  7. mineralgreygt

    mineralgreygt Member

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    Remove dog bone, possible bad u joints
     
  8. Jakespeeds

    Jakespeeds Member

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    I have a 98 as well. Does the rearend have the factory upper and lower control arms? If it has adjustable upper arms and they are just slightly off it will do exactly this.

    Jake