have a problem with a front end wobble
 

well after a week of tuning up and replacing parts on my new xj, i finally have a problem. i have a slight vib in the steering wheel.... mostly around turns. the tires are balenced, the front end seems kinda funny. i did the ol' bearing check, u-joints looked ok, could it be tierods? i was on my way home from work coming around a turn and hit some small bumps and all the sudden it felt like the left front wheel was going to come off. then i was fine the rest of the way home... any ideas?

check your lugnuts first then check your steering and suspension busings what not and grease everything