transmission shaft

English Thesaurus

1. rotating shaft that transmits rotary motion from the engine to the differential (noun.artifact)

hypernym	:	rotating shaft, shaft,
definition	:	a revolving rod that transmits power or motion (noun.artifact)

part meronym	:	gear box, gear case, gearbox,
definition	:	the shell (metal casing) in which a train of gears is sealed (noun.artifact)