Tons of vibration in steering wheel?

[Vince@Meanstreets]

With the vehicle in a safe position have someone slightly turn the wheel left and right. There is a slack point right before you feel resistance. Try to have the wheel person stay with in that point maybe a bit over.
Crawl under and visually inspect the linkage. I bet you have something worn or getting loose. Look for up and down play as well as no movement while the box is turning.
Also pull your front wheels and have them balanced and check for bends in the wheel or tread separation. For sits and giggles.

I know it's a truck but Look up jeep death wobble for other tests you can try.