I have a 97' F-150 w/ a 4" Trailmaster lift bought new in 98'. The components have worked very well with my truck up until about a year ago when I noticed a bad shimmy that is making it very unpleasant to drive. There is also significant road walk, even more than what is expected w/ 33" Goodyear MT's. I have asked my ford dealership what may be the problem, and they said it looks like it may be the "Idler" arm. I was wondering if there is a beefier application or maybe a steering stabablizer option. Any help would be greatly appreciated...