Lewis Hamilton took on a new gearbox as part of an entire rear-end rebuild after crashing in the second practice session at the Canadian Grand Prix. The reigning champion can rest easy, however, as it is unlikely to cause him to serve a grid penalty in Montreal.
Hamilton made an error at the Turn 8-9 chicane half an hour into FP2 on Friday, clobbering the wall on exit and sustaining a right-rear puncture.
With other damage also potentially done, Mercedes opted to change the whole back of his W10.
This lost Hamilton an hour of the session, denying him a full crack at a qualifying sim, as well as crucial long runs.