Death wobble
You can disconnect the pitman arm from drag link and grab the pitman arm and push it from lock to lock and put your other hand on the outside of the case and feel if it's smooth or ruff, clunks, or other bad noises. Also you can adjust it if needed. Get the wheel centered and lightly move the pitman arm from side to side and see if it feels loose. Don't move the steering wheel just enough to feel the play.