After the initial break-in, clutch failures usually manifest themselves with chatter, or shudder. My defective clutch affected gears 2, 4, and 6. The other clutch would affect 1, 3, and 5, but I don't remember which side reverse is on.
Fluid leaking on the clutch(s) may cause this, as well as defective clutch components, or abnormal DCT shifting behavior which glazes the plates. My clutch was damaged from abnormal DCT shifting behavior. It (clutch) was replaced, and all seems well now, several thousand miles later. My issue reached its peak at 4K miles on the odo. The latest transmission flash was installed at the same time, which mitigated the revving which destroyed the plates.
I have already posted this much earlier in this thread, but thought it prudent to repeat.
My problem was reproduced by the service department, and coupled with my own knowledge about what was happening and why, and telling their transmission guru, it was fixed, and promptly.
2012 Focus; Maybe 3rd Time's the Charm?