I just recently purchased a 1998 model with widened a arms and rear axle. My problem is that when I get up into the higher speeds the front will start to shimmy. It appears that the play is coming from the upper a arm bushings on both sides where they bolt to the frame. I took them out and re greased everything and still had the same results but not quite as bad but still bad enough to where it needs to be fixed. The a arms do not have grease zerts. Any ideas would be appreciated, Thanks.