So my car originally had an M127 Engine and came from the factory with a manual. Sometimes ago before my ownership the engine got switched to an M129 engine (which came from with an AT from the factory).
My problem is that the whole car is shaking like crazy, at idle, while driving, everywhere. I think that my flywheel is "out of balance" and that I need to balance it neutral. If so where or how can I balance my flywheel to be neutral?

Thank You, Yannick