I have been all to familiar with all these isssues,first off the clicking sound affects mostly the 13+SHO with the performance package,this is my second set of front hubs that the dealer has installed under warranty,the first set only lasted me about a year untli it unfortunetly returned with vengeance,would suggest speaking with your service advisor and try to have the Timken heavy duty hubs ordered as an alternate and possibly pay for the difference in price which should not be to much unless you like changing them every year or so and would also benefit you and the dealer at the end,now getting to the front end clunk noise which in my case was simply fixed by re-torquing the strut tower bolt to oem specs because it was fairly loose and solved my issue,hope this helps anyone out in determinig the cause of these annoying noises. Z