For some reason there is a high pitch "ting" noise that sounds like its coming from the rear underneath the car but im not to sure what it is. Its the worse when going over and bumps or anytime the rear suspension goes down, i have a new exhaust and checked the heat shields but im not sure what else it would be. It sounds like a small piece of tin vibrating or buzzing but its very loud and isnt affected when u accelorate just when you go over and bumps or alot of movement. does anyone know what this could be?