Well,First off, it would take a BIG BUMP to bend your steering linkage, However, that's where i would start looking..check all the linkage between tie rod ends and your TrackBar .. if all is good, check the Steering Intermediate shaft. look for signs of the shaft spinning from the splines(not likely but check it anyway). somehow or another the Geometry of the Jeep Changed from that BUMP.. also, set the front wheel on the driver side in a straight ahead position by eyeballing the front tire to the rear. then look at the passenger front tire in relation to the rear, this will give you an idea if the frontend needs to be aligned..It would be very obvious if the Steering gear box has failed. Exessive end play or a cracked housing, but at this point you would have noticed a pool of powersteering fluid oooozzzinng out, so if thats not the case, rule this one out. i'm willing to bet my dog's nail that there is something bent in the front..