recently my car has been wobbling ( the steerling rattles back and forth) at low speeds 20-30 and i hear a thumping sound when i turn sharply every once and a while. i think i might have messed it up while doing some dounuts can some one give me an idea to what might be wrong with me car before i take it to the dealer. it is still drive able.

 

WAY too vague of a description to determine what's wrong. BTW a dealer really won't be able to fix your problem any better than a qualified mechanic. Take it to a quality FRAME shop(not a generic alignment shop ie..Firestone) and let them figure it out.