Why Does My Car Vibrate While Driving? Cars.com Do You Hear Clunking or Feel Vibration While Driving Your 4x4 or Heavy Duty Truck? , That could be excessive play in your universal joints (U joints)a small part with BIG responsibility!, Why 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 5 Reasons Why Your Car Shakes while Driving Infographic Why Does My Car Shake at High Speeds? Capital One Auto Navigator Why Does My Car Shake at Idle but Smooth Out While Driving?