We had an icy morning the other day and I decided to try out the AWD.
I was alone on a straight wide road and I stopped the car. I then gave it a burst on the accelerator causing some of the tires to slip. Naturally the traction control light came on, but coming from outside the passenger wheel hub there was a distinct grinding noise (or maybe a loud rapid clicking).
I thought maybe it was the TC auto-breaking the tire due to the slip. I then turned off the TC and tried again and I got the same result. Light flashed on the dash and noise still came over.
Any ideas? Is this normal?