If it was related it would most likely be a wiring harness/connection issue IMO. Those harnesses would have been disconnected when the flywheel was replaced. Hopefully they didn't get pinched and damaged. As well as the connections, check that first.

__________________
2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue