Icon Vehicle Dynamics Suspension Question: Why does the steering on my 05-06 Superduty shimmy over bumps?
There are actually a few contributing factors to this issue. First and foremost, Ford Motor Company has a Technical Service Bulletin (04-26-1) which indicates that this is a problem the manufacturer is aware exists even in stock form. The TSB calls for a steering gear mesh load adjustment. We have also found a few new trucks with an abnormal amount of slop in the upper tie rod end (at the pitman arm) which can also contribute to the shimmy issue. Beyond the above I have heard some people refer to this as bump steer. In stock form the 05-06 Superduty does have approximately 3/8″ of bump steer from ride height to full compression and roughly 1″ throughout the full suspension cycle. However, what some describe as bump steer is largely steering feedback. This is something inherent in the design of the 05-06 suspension even in stock form. There are two factors which we believe contribute to this issue. We have done some testing in this regard and believe that this stems in part from the pla
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- Icon Vehicle Dynamics Suspension Question: Why does the steering on my 05-06 Superduty shimmy over bumps?
