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Re: Grand espace shacking at 50 mph
I'm thinking that it has to be wheel / hub-related, as the engine speed would differ depending on what gear was in use, but the only constant is the rotations of the wheel at a given speed.
Can you try swapping the wheels around (front:rear), just in case there is a flat-spot or sign of distortion.
If it still happens, it could be the output from the gearbox.
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