Temps have been well below freezing for me for a couple weeks now. I notice that when UNDER LOAD, especially if I happen to conduct a gear change at the same time, there is a very audible click sound from under the Jeep. If I downshift before 40ish, and am engine braking, I can hear it but not as loud. When accelerating there is no sound no feeling. I'm not complaining, just asking if anyone else has the same thing. My thought is it is the AWD system engaging.