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Reply to "Steering wheel shimmy....."

RRS1,
Check the condition of the top & bottom ball joints as well as the tie rod ends.
When you steer one way or the other the caster loads up the suspension components.
This is because caster creates a jacking effect.
For example if you steer left you are actually jacking up the front left of the car as the wheel is sweeping downward as you turn.
That's why with the more caster, the heavier the steering becomes. Your steering wheel effort is lifting that corner of the car.
If there is any free-play in the ball joints its during the steering movements that you will feel the wheel shimmy as the natural effect of caster is that the wheel wants to be pointing straight ahead.
Your forcing it to turn, but it does not want to be there.
Any back-lash in the steering will then be noticed.
Hope this helps.
regards,
Tony.
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