I've been having a hard time figuring this one out. My 1997 2.5L on 33in tires has a pretty rough wobble at 40-45mph. If I try to speed through those speeds while holding down on the steering wheel it isn't as noticeable but you can still feel it. The steering doesn't have much play and besides bushings everything seems tight. Could low tire tread cause this? If I maintain the 40-45 and loosely hold on the steering wheel it gets worse