hi i have a 1998 honda crv which broke down today it was vibrating when i drove and then when i pulled up at some lights it made a noise as if something had fallen off and makes a banging noise when it was drove i got rac out and they have written down NOISE CLONKING FROM REAR DIFF/PROP AREA POSS FAULT WITH DRIVINGTRAIN . the garage they took it to says i have to get the parts myself but i do not know what i am looking for can anyone shed a light on it for me .