- transmission, transmission system - the gears that transmit power from an automobile engine via the driveshaft to the live axle
--1 is a kind of gear, gear mechanism
--1 is a part of drive line, drive line system
--1 has parts: clutch; fluid drive; gearbox, gear case
--1 has particulars:automatic transmission, automatic drive; four-wheel drive, 4WD; hydraulic transmission, hydraulic transmission system; standard transmission, stick shift