So I just got a 2013 F10 6MT last month. Super excited about it. I floored the car at the end of an on ramp today in 2nd, shifted to 3rd just before redline (definitely a hard shift, but nothing I haven't done before or in other cars), and right after that felt a shudder. Drove about 10 miles home. No check engine or any lights on. Clutch doesn't seem to be slipping and acceleration is fine. I can shift, although it's a bit tougher to get into and out of gears. Big issue is there is now a strong vibration (I mean, really rough) that is a function of the engine speed. Vibrates with or without the clutch engaged, whether or not the car is moving. I've driven other manuals (including a 996) and have experienced a clutch slip/give out, it's not that. Otherwise - not super mechanically inclined. Help - any ideas what it could be?