I think I might have this.
If I tap the throttle when cruising, my diffy goes clunk, hard accelerations and letting off the gas, whole jeep goes clunk.
Today, I drove over a parking curb and the jeep rolled back on its own. When I stuck it in reverse, my rear end was going clunky clunk.. sounded like harley going by.
Put it in drive then reverse, I still get harley effect. I put it back in drive and went in for lunch...... When I came back harly symptoms were gone.
I think its time to use that super warranty they claim I have.
Is it me or everything plastic on the new Jeeps is cheap and breaks easily?