My 2013 has 85k on it. Leaving work today. Driving slow out of parking lot, less than 25mph. Sudden Large THUNK from the driveline as the dash lights up with warning and AdvancTrac notices. I roll to a stop to see what’s up. Shut off car to try to reset the AdvancTrac, which has worked before. Restart and still plenty of dash lights. Tried to accelerate and engine just rev’d but car barely moved. Felt like a slipping torque converter. Tried restarting and going through gears several times. Car moved a little finally but I was afraid I was going to burn something up due to the high RPMs. Tried shifting into Reverse and the car moved normal. End up backing up about 500’ and leaving the car until tomorrow. No codes from my device. Any ideas?