Hi, I just found this board and thread through a google search. Brucey, I have the exact same faucet and same issue your are experiencing. I also moved into my house a little less than 2 years ago and the faucet came with the home. I am on my third diverter valve (including the one that was in the faucet when I moved in). I have also replaced the bearings (rings) and ball that you select hot/cold water. I have contacted Kohler a few times, sometimes they are nice enough to "goodwill" the parts even though the faucet is not under warranty. When I give them these symptoms they keep telling me it is the diverter valve. I have had my most recent diverter valve in for a couple weeks now. When I replaced the 2nd with the 3rd, I could not find any difference in the two, and they are both giving my the banging. I believe the problem lies deeper than the diverter valve.