I'm just curious what this could be... My car squeaks when I go over bumps and it is driving me INSANE. My guess is that it's either my suspension or my shocks. It's not the body of the car, btw, it's something under the car.
Thanks in advance for any replies! I really want to get this fixed!

 

Just lubricate any rubber bushes with oil.

 

Same problem here! Several people have looked at it and suggested sway bar bushings... Lubricating them helps for a bit for me, then the noise comes back, only on hot days though. Probably going to replace them next week b/c the sound is awful!