are you talking about a tie rod or a cv shaft? both can cause a wobble but most likely the tie rod is the culprit. even a bad tire will cause a wobble. the bearings will make a growling noise that will come and go if you move the steering wheel a little to the left or right as your driving, unless you've let it go for so long that it's toast it'll make noise all the time. cv shaft noise will usally be while your turning under power, it'll make a pop, pop, pop noise.