Need help fellas

[joe260]

ok heres the story.. i just came back from a drive bout 10 mins ago.. i put my foot down to overtake and then backed of and felt a big clunk.. i dont know what that could of been or what it was. but ever since i have owned the car when i go to stop.. lets just say im driving through a suburban area and come to the end of the street and is about to turn i slow down as u do so u can see if there are any cars coming... then when theres none i DONT come to a complete stop but when i slow down and then go to take off i sometimes.. not all the time but sometimes feel a clunk not as bad as i did not long ago... now i was thinking maybe my diff but im not 100% sure as i am not a mechanic.. so please tell me ur thoughts thanks JO