Hi, I am a new member here and glad to be here. I have the exact problem on my 2012 Grand Cherokee Laredo. My vehicle has been in the dealer service more than I have driven it. They changed the starter, alternator, transmission fluid and reprogrammed the transmission and still the noise appears. What can do we about this problem? Anyone have a solution? I am scared that there may a serious problem that Jeep is just not willing to pay for. Any help is appreciated!