Thanks everyone for your help. I can't believe that the PBR pads need a shim and it is not included with them. Yal, if you find that extra set of shims I will take you up on your offer. I can send you money for your trouble.
Will the shims really cure the problem?
I will try them but if they don't I guess I am going to change the PBR's out and chalk it up as a learning experience. I guess I should have searched here first.