All of it. The 10 percent figure you occasionally see is nonsense that a lot of people believe just because they've seen it so much.
Quick Answer. Some things that cause a vehicle's front end to make a clunking noise are worn ball joints, a damaged tie rod, broken or loose sway-bar links, hard or damaged shocks, and faulty shock mounts. An automotive professional can inspect the vehicle's front end to locate the source of the clunk. Continue Reading.
If brakes on a vehicle make any type of noise under driving and braking conditions, it is the sign of a malfunction. Noises may be a variety of brake and brake mounting systems failures, or they may be other problems that occur when the motion of braking creates movement in another part.