About a year ago, I had my awd car towed 12 miles with the front wheels on the lift, rear wheels on the ground while on neutral gear. The car's drive train is the front wheels.
I just learned awd should be towed with all wheels off the ground (as stated online and in the car manual. Otherwise, the viscous couplings will be damaged. However, it has been a year and I haven't felt any issue with the car.
So what can one expect in my situation? Is the awd still working? Do I need to change the fluid in the viscous coupling? Is transmission indirectly damaged, that I be required to replace it in the future?
So far the car is running fine for a year since being towed, but I am being troubled by this notion. I'm looking for a second opinion before I have the car checked. I will update this post with the checkup results within a month.
EDIT: I finally had my car serviced at a local mechanic shop and asked a veteran mechanic this question. According to him, you will notice the problem immediately, such as hard steering, noises, and not normal feeling of the car changing gears. So it seems like i should'nt have any issue. But I will still ask my dealership shop for another opinion when I do visit them. and will update further.