Ford F250 Front End Shimmy

svbayless wrote:
I have a 2011 F250 4 X 4. I am have problems with severe front end shimmy at highway speeds. The truck has 35,000 mile on it and this has just started. We changed the steering dampener, steering arm, changed front shocks, and rotated front tires to rear. None have resolved the shimmy issue. Any ideas?

Too great of a caster in the front axle can and will cause shimmy , too little caster will result in wander in the front end.
A wise old man in a front end shop back in the 70s told me to shim the front axle back till it starts to shimmy , then ease off the shims till it stops . This he so wisely suggested is a great way to set your own front end up without having to have a big expensive machine to measure the angles. Having used his advice many times over the years I can honestly say it works. :)