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  1. Vibration at highway speeds

    6.0 Drivetrain problems
    I have a 2005 F-250 no mods to the drivetrain or engine except a K&N intake. My cab vibrates pretty significantly between 45 and 70mph and only if the revs are above 1500. Before 45 and after 70 there is no vibration and if I'm coasting down a hill or to a stop there is no vibration. My intital...