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certain speeds

  1. Vibration between 63 and 75 mph ONLY - not balancing

    9-3 Sedan, Cabrio '04+, Combi, 9-3X Workshop
    I have an 03 Saab 9-3 Arc. About 3 months ago the car started vibrating at a certain speed, between about 63 and 75 MPH. The vibration goes away above and below these speeds, and the car vibrates at those speeds even if not accelerating. I had uneven wear on my front tires so I went and got 2...