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Syncromesh disengaged

Syncromesh disengaged

The gear turns freely on a bush, rotated by a meshing gear on the layshaft. The synchromesh unit, splined the the mainshaft, rests near by.

Explained in

    How manual gearboxes work

    Internal-combustion engines run at high speeds, so a reduction in gearing is necessary to transmit power to the drive wheels, which turn much more slowly. Read more

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