The term “transmission” is used for a device that is located among the clutch and also the propeller shaft. It could be a gearbox, a torque converter, overdrive, fluid drive, or hydraulic drive. In this kind of gearbox, all the gears of the main shaft are in continuous mesh https://gearbox75296.tinyblogging.com/indicators-on-gearbox-you-should-know-77473135