Shake
The shake is a low frequency
vibration, typically 5-20 Hz. The shake is sometimes seen in
 the steering wheel, the  seat, or the console. The best description is the
 feeling from an out-of-round  or unbalanced tire. Customers may refer to
a  shake in one of the following  terms:
In most cases, shake is caused by damage or wear to the following components:
|     •  | The brake rotors (vehicle-speed sensitive) | 
 
|     •  | The steering tie rod ends | 
 
|     •  | The suspension ball joints | 
 
|     •  | The engine (engine-speed sensitive) | 
 
Roughness
Roughness is a vibration with a slightly higher frequency than the shake,
usually 20-50 Hz. Roughness is similar to the feeling you get
  from holding a jigsaw.
Buzz
Buzz is slightly higher in frequency: 50-100 Hz. A buzz
is similar to the feel of an electric razor. You may feel it in your hands
  through the steering wheel, in your feet through the floor, or in the seat.
  Inspect the following components for a possible cause:
Tingling
This is the highest vibration frequency that you can feel. Tingling
may sometimes produce a pins and needles sensation. Customers may say the
  vibration creates numbness in their hands or feet.