vibrations while slowing or braking? Get the front brake rotors checked.
During acceleration? I'm not sure. But when both idling and acceleration the engine's combustion can cause a lot of vibration in the steering wheel if you are in an older vehicle.
When the system is active this is normal due to the braking system being applied to a spinning wheel or a wheel that in under or over steering.
The vibration was so severe in the front end, I had trouble steering the car. I could only feel the vibration when the car accelerated. Earthquakes cause a distinct vibration of the earth.
You will feel a vibration in the steering wheel
Steering wheel vibration when applying brakes is usually caused by warped disc brake rotors
Rack and pinion steering will not cause warped rotors. The tie rods, which are part of the system, can cause a vibration if the bushings on the ends are worn out. Warped rotors will do the same thing, and this will show up when applying the brakes.
parking brake on.
Either your drums or rotors are out of round.
Go to a garage, and get the wheel balancing checked out on the front wheels.
Vibration of the car/steering which gets bad at a specific speed.
Normally caused by a tire out of balance or a bent wheel or both.
why do we need a steering system