If you get some Ruglide or the likes... which is dilute Muratic Acid.... and spray on the rubber bushings it will probably take take of that noise... the metal stuff seldom makes those types of noises compared to the frequency the bushings... A nice container is the gallon with the three foot hose and sprayer on the end... lets you set the container on the ground and you just reach your arm up under and spray... If you bounce the car while you are spraying it is likely to tell you the exact one making the noise. but go ahead and spray all of them... LOL>.... including the control rod bushings and the sway bar bushings....give it some time to seep in and spray again if it is not cured instantly... Greg