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Vibration

Discussion in 'Driveline' started by First-on-race-day, Aug 17, 2019.

  1. First-on-race-day

    First-on-race-day Member Established Member

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    Longview Texas
    So my 03 cobra started developing a vibration while accelerating. It feels like a u joint because i feel the vibration in my seat. But i jacked up the car and noticed that one of my inner halfshaft boots slung all its grease out. How do i differentiate a u-joint vibration from a halfshaft vibration?

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  2. Bdubbs

    Bdubbs u even lift bro? Established Member

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    Joined:
    Jan 8, 2010
    Location:
    MN
    If all the grease is gone I'd replace that first. Replacing u joints on the driveshaft is fairly easy and not that expensive. I replaced mine in my 90 coupe not long ago.

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  3. Comp04svt

    Comp04svt Active Member Established Member

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    Location:
    Macomb, MI
    Obviously replace the halfshaft, but I would think a vibration while accelerating would be something along the lines of a pinion angle issue, possibly from worn IRS or differential bushings or along those lines. A bad u joint would have obvious play in the joint. Lift the car and put the trans in gear with the parking brake on, you can then wiggle the front and rear u joint/driveshaft and check for any play. I would put money on worn diff bushings personally.
     
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