Hi, i'm newbie here. i'm driving a toyota corolla AE110, recently i done a balancing for the tyre and because of the tyre problem, i hv to exchange the front with the rear tyre. After done there is a sound comes out when i pressing the brake. the sound seems like "khr khr khr, glok glok glok", i'm not sure where is the sound comes, bt i don hear any sound outside the car. i do ask the person who done the balancing and i dont think that he can solve the problem, for those who gt any idea about it please gv the opinion plz.