What do you mean by "wobble"? Is it that your whole front end feels like it is out of control, or is it more like a vibration coming from the front and not really in the steering?
If it is the former, was your Jeep realigned after the lift?
If it is the latter, it could be the u-joint. Grab hold of the front drive shaft and see if you can move it sideways or up and down on both ends.