Originally Posted by
scirocco
I would suggest that even before he does that, the OP checks to see that the rear wheel skewer is tight. It can be difficult to tell exactly where creaks are coming from, and 9 time out of 10 in my experience a loose skewer is the cause of creaking that comes from somewhere down in the drivetrain.
I should have been clearer when I said to make sure EVERYTHING was torqued to spec... finding little creaks can make the best of us insane.