if its the track bar it will usually pop when turning the steering wheel from lock to lock while parked with the engine running. you'll be able to see it move if you're looking under the front end while someone turns the wheel. the bolts holding my trackbar bracket on constantly come loose, ive tried red loc-tite, impact gun, everything short of tackwelding them, but i still have to tighten em up every 6 months or so and im only at 4" lift. it could also be your stabilizer... just like a shock absorber, it should be checked every 30,000 or so. you said it jerks when you hit a bump at speed thats what the steering stabilizer is there to prevent. but it most likely wouldnt cause your wobbles.
