Tractor swaying and vibration knocking my mirrors off

Hi everyone, I'm experiencing swaying and vibration and I'm wondering if anybody has had that problem and found it was caused by the steering tires.

 

Thanks for the comeback Baha. New tires, centrmatics and shocks going on today. Hoping that will do it. Otherwise I may have to change the steering box. Just wondering if the tires had a slight crown to them if that would make it wander

 

Thanks for the comebacks everyone. I will check all of theses suggestions. I'm noticing movement in the front rears front yoke, maybe remove a shim or two? Also the cab was really shaking yesterday at about 65 mph. Front cab bushings are tight but can't tell if the rear mount is loose or worn. All u joints are good. On my front rear, the driver side spring is sitting higher than the passenger side. I can stick my pinky between the top of the spring and the wear pad. If the rear is not pitched properly would that cause vibration?

 

Hi Everyone, sorry for the delayed comeback, I've been doing a lot to remedy this, and I think I've got it. New steer and drive tires, which I needed anyway, new front shocks, all new wear pads (46k air trac), centramatics on the steers and a little tweak to get my air ride to proper height, oh and a new drag link. Almost a 100% now. Just waiting for an appointment for an alignment. Thank you all for your help and advise.