so a while ago i noticed when i was coasting down a hill at about 3mph when i heard "click click click" coming from the rear.....didnt really pay much attention to it b/c i have every intention of putting 373 gears in this winter and as of right now, the car has a WARRANTY but anyway, as i went around a bend today i noticed it again and it was a bit louder and deeper.....not to sound dumb but i really have no clue how/if i broke something and if so...what did i break?