Hi nikokin, In my case, the issue is most noticeable when making a U-turn or slowly climbing an incline, where the AWD system engages more aggressively compared to driving at higher speeds. The vibration feels like a large mobile phone vibrating underneath the car, mainly in the center and rear of the vehicle, with no noticeable vibration coming from the front. When I inspected my driveshaft, the rear rubber flex disc (guibo) was in terrible condition, while the front one still had some life left in it. Based on your description, I would be more inclined to inspect the suspension components first. It may be that one of the suspension parts has started to wear out and is causing the symptoms you're experiencing.