If your ride hasn't been feeling quite right lately, it might not be just the road. From subtle vibrations to tires that won't seem to hold air, the small signs can add Vibrating while idling in drive If your car shakes at high speed the cause is often mechanical imbalance. Small issues become more noticeable as speed increases. Unbalanced tires are a common reason, creating vibration that grows Car Vibrates When Idle: Major Causes and More dubizzle