Recently, at highway speed (55-70 or so) I will get this strange side to side shimmy, it's like the car is floating left and right, almost feels like it wants to pull itself in one direction and then the other...could worn out shocks cause this? Everything is tight...alignment was done in june and I really don't drive the car long distances...so, not a lot of miles since the alignment...ball joints on both sides are a year old. Koni shocks are adjusted the same on both sides. Do tie rods fail? If so, do they show any symptoms beforehand?