rotating stud
Hi KSTRS,
That happens sometimes when replacing ball joints, and other front end parts. Try to compress the stud into the socket it fits into and then tighten it. In your case you might want to use a jack on the bottom of the knuckle, or even under the tire, to accomplish that. I've even used big water pump pliers on tie rod ends etc. that did that.
JoeBiodiesel