Steering shacks replaced steering dam...

shakes?or shacks?Let's just say that you mean shake.If your brake pedal pulsates,replace the rotors.If your steering wheel shakes(low speed)broken belt in front tire.Jack up one tire enough to clear the ground,spin it.Spins nice,lower and jack up the other.Spin that one,if the belt is broke it'll be very noticable.While up in the air check the lug nuts,if they're loose it can make the steering shake too.If the shake is at highway speed,bad shocks or tie rods or ball joints or a combination of these.Jack up a front tire and try to move it(Key turned off to lock steering).If it moves top to bottom,ball joint.Side to side,tie rod.Doesn't move,shocks.The worst could be a bad hub bearing,but you'd hear it and you said nothing about any noise.