Is your car trying to tell you something? Don't ignore those mysterious shakes! Vibrations at specific speeds are often early warning signs of drivetrain wear. Here's a quick guide to Why Is My Car Shaking? 4 Reasons and What to Do Meineke Vibrating while idling in drive What causes excessive vibration while driving? Expert mechanic answer now. VIBRATIONS WHEN ACCELERATING, COASTING, BRAKING. FIX!