Noun
wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed
Source: WordNetA trailer can virtually double the loading capacity of a sturdy truck-another good reason for beefing up the power train. Ken Kern
the fool got his tie caught in the geartrain Source: Internet
That required reduction gearing, but building reduction gearing that could operate at high rpm and at high power was difficult, since a slight misalignment would shake the power train to pieces. Source: Internet
Sharing little in common with the rest of the line beyond power train, the sporty siblings caught auto enthusiasts' attention and established BMW as an international brand. Source: Internet