well, mine pops/clicks...
i also have a torn cv boot, so that would help lead to it as well.
I have 144k on mine.
be sure to check RockAuto because i just did for my svt and they have them.. a lot cheaper than cfm as well.
Tha Kraken: http://www.focusfanatics.com/forum/ford-focus-builds-general-showroom/285082-meet-kraken.html