[Cammaxon]

Having a LOUD!!! Metal bang come from my transmission area, like someone hitting a hammer on a metal box.
It is not continuous or rhythmic.
It happens while driving and stationary.
It does NOT happen at all when the clutch is disengaged (clutch pedal all the way to the floor)

NO problems shifting, or driving.

Car's at DB's they are going to check into it on monday/tuesday.

Any ideas what i'm into here?