So I have been driving the G8 for about a week and it is amazing! But I drove one night on the road and heard a thump I thought it was a rock or just a bump in the road... Considering I was doing 72mph I didn't think anything of it when i arrived at my friends house it was normal. But then when I went to leave my car completely got stuck by nothing literally, I thought it was my breaks, But it was the back left tire... I was confused as so was my friend, we looked and could not find anything turns out there is something either stuck in my rotor behind the rock shield or the rotor is falling apart.. I did notice that the back rotor is starting to crack for when I drive it makes a loud scratching sound and thuds hard like my tire is falling off... Now sense i know what the problem is how do I fix it? Obviously take the tire off but I can't seem to get it off with an axial wrench because I guess they have been torqued on tight. Any ideas on what i should do? I did try bending the shield back away from the rotor but there sounds like there is something stuck in it... I have to drive it home and am worried that it might cause the rotor to crack completely and fall off.