In case it helps, my AOS made a horrible sound that convinced me my throw out bearing was dying. Here are two videos with the sound:
https://photos.app.goo.gl/DMVDV6igbvywzNhGA
https://photos.app.goo.gl/QuN647ebXWVdqib96
When the enormous cloud of smoke appeared, I knew it was the AOS!! 😏
Good luck!