one day i was changln a tire and d jack fell causin the back drum 2 hit d soft ground i jacked it back up put the tire on my back brake start actin funny when i push them they were real soft sometime i have to pump them 2 stop now my car will not go in drive it will start when i push d brakes they go too 2 floor my car will not shift out of park it is stuck what u think the problem