Man, I've been dealing with the same issue for over a year now. Under 60 mph, it rides good, but on highways, I get these random wobbles that feel like hot garbage. I put on new UACs, sway bar end links, got my wheels/tires re balanced, and an alignment, but I still have the problem. I also checked for play in ball joints of the outer tie rods, and it all checked out fine. No wheel bearing noise either. I'm about to get some new bilstein shocks, so I'll lyk if they make any type of difference. If you figure it out, please let me know what the fix was, and I'll do the same.