I have a grinding noise in the rear when I hit the brakes. I found 2 of the caliper mounting bolts in the rear GONE! They backed themselves out, and are gone. Causing the caliper to bind and hit the wheel. I did a brake job in the rear in December 07. But now they have backed them selves out. I noticed it when I drove it this afternoon. Where can I get the bolts at? The dealership? I guess I will locktite the new ones in, along with the old ones.