***Before I continue, let me say that I replaced my door check because it was clunking whenever the door was opened/closed. This may not be a good reason to replace it, as I found out. The new part did not totally solve the problem, though it was a bit quieter. The real problem, it turned out, was that the metal on the door where the check mounts is stressed, and buckles a bit and creaks. I will be looking into reinforcing the mounting point.
Ok, back to replacing the door check.