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Shaking at 60 plus MPH S70 1999

I have a weird problem. Once I reach about 60 MPH the front end starts to shake like crazy. I had the tires balanced, brakes and rotors are, according to the mechanic, in good shape and nothing is loose. My first guess would be that therw is such a slight warp in the rotor that the shaking is not noticeable but it does stop at 75 mph. Since most of the highway speeds in my area are 60 MPH I feel like I'm going to shake to death. Anyone have any idea what could be causing this? I thought about replacing the rotors anyway but not sure?

95 850 104k
99 S70 80K








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    Water in tires? S70 1999

    See this link:

    http://popularmechanics.com/automotive/sub_care_clinic/2003/2/auto_clinic_203/

    Water in tires?

    cn








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    Shaking at 60 plus MPH S70 1999

    Mine did that a while back.....turned out to be the alignment.








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    Shaking at 60 plus MPH S70 1999

    When you say nothing is loose, what exacty was checked?

    Inner and outer tie rods, ball joints? Could be warped rotors, but you would feel a pulse when you were braking if that were the case. Have you tried swapping tires front to back? If you have alloy's, could be an out of round rim. Check that with a runout gauge (tire shop can do it)

    Are the tires evenly worn, and have they been rotated every 3-5k miles?

    Good luck!

    BB







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