multiple problems with the Z

[JsickZ32]

1). The other day while driving around one of the rear caliper bolts snapped and cause the caliper to slide up and hit the inside of the wheel. I had to drive home like that for 15 mins. I replaced that bolt and tighten everything up but now when i brake hard the pedal shudders but not the steering wheel and it didnt do that before. Maybe i damaged the rotor/caliper when i drove home like that? The rear rotors were bought new back in 2010 and never driven on cuz my car was sitting until early this year.

2). Sometimes while driving around the steering wheel jerks a little to either side. Its happened 8 times in the 3k miles ive driven the Z this year so far. I have ES steering rack bushings. I have adjustable suspension all around but the tension rods are unknown brand. Everything else is powertrix/SPL. The tension rods are rusted to s*** but the joints seem cleaned and tight. What other things can cause steering to jerk like that? Wheels are balanced and i just got an alignment. Dont want to spend money in new tension rods if i dont have to..

3). When i pull on the front driver side wheel in the 12oclock position i can hear a click. I had someone pull on it and it seemed like it coming from the Kingpin bearing area. So i got a used kingpin in good condition and put it all back together and when i pull on the wheel on the 12 oclock posiiton still does the click sound. What else could it be? Bad bearings? The noise seems to be coming from that area.

I know its long but i really wanna give as much detail as possible. Thanks for your help