If the rotor failed at speed during braking it could cause this type of accident. The rotor was split directly in half. I think that if it would have happened that way it would occur on the front rotor as little force is applied to the rear, but who knows.
Reason I ask is that I'm reading on other websites were this same type of accident/damage can and does occur when a rotor fails. I guess it's somewhat common on the cross-drilled rotors from what I gather.
No. This is not a common problem on vehicles that are still running a 100% stock rear IRS and stock solid rotors. Does your '99 have drilled rotors though? If so, then yes I would be a little bit worried...
WHERE ARE THE PICS?!?!?!? I am very interested in this as I Had a rear knuckle split on me. Is this the same thing? Ill post pics of mine in a little bit.