Hi everyone.....I need some help identifying the possible source of a "pop" noise which sounds like it's coming from the frame when flexed going over bumps or backing out of our sloped lane way. I've had it back to the dealer a number of times for other warranty correction issues but they can't duplicate the sound even when I leave the vehicle for a few days. It almost sounds like a loose knuckle bushing or loose connection on an undercarriage heat shield. The dealership says everything is tight. Any suggestions about other possible sources of this noise ? Thanks for your help.