I have a 2016 Charger Pursuit. It has developed a knock under the car. It sounds like a U joint, but from what I've found out there are no U joints in the driveline. It started out at low speed or coasting, now it's constant. Sounds like it's coming from the area of the transmission tailshaft area. So far I haven't noticed any vibrations. Is it the carrier bearing or something in the back of the transmission?