What could be wrong if my car gallops too much on a rough road? on 2002 Mercedes-Benz ML320

Since I changed the Hub of my car front wheel, the car has not been balanced. It rocks when driving on a rough road and gives unpleasant noise at every bump or gallop.What could be wrong?

Asked by for the 2002 Mercedes-Benz ML320
wheel could be loose or shock could be worn out, have a shop check this right away