I'm guessing it is a 6 puck clutch (I didn't search through the link to find the exact clutch). These clutches really grip well, which results in a lot of chatter. The chatter will ease up as the clutch is broken in. He'll also "learn" how to drive with it and find that the chatter will largely disappear once he gets used to it.
[This message has been edited by Neils88 (edited 07-28-2014).]