transmission
The mechanism by which power is transmitted from an engine to the live axle of a vehicle or machine.
While 'transmission' can mean the act of sending something (like data or disease), in mechanical engineering it refers specifically to the gearbox system that manages the speed and torque ratios between a power source (like an engine) and the output (like wheels).
Word relationships
- gearbox: Gearbox is often used interchangeably with transmission, but 'transmission' is the broader term that can include the clutch, torque converter, and drive shafts in addition to the gears.
- direct drive: A direct drive system connects the motor directly to the load without any intervening transmission or gear-reduction system.
Commonly confused with
- transference: Transference is the general act of moving something from one place to another, while transmission is the specific mechanical system or process of sending power/signals.
Word family
- transmit (verb): To pass on, transfer, or send.
- transmitter (noun): A device that transmits something (often radio signals).
Collocations
- manual transmission
- automatic transmission
- transmission fluid
- continuously variable transmission
Example sentences
- "The vehicle features a continuously variable transmission that seamlessly adjusts gear ratios for optimal fuel economy." A car review discussing gearboxes
- "Regularly check the transmission fluid level to prevent the internal gears from grinding and overheating." An industrial machinery manual
Memory hook
Think of a radio 'transmitter' sending music through the air. A mechanical 'transmission' 'transmits' (sends) the engine's power to the wheels. Transmission transmits power from engine to wheel.
When not to use
Do not use transmission when referring to a simple direct shaft connection without gears; a transmission implies a system that can alter speed/torque ratios.
Fun facts
- The first automatic transmission, called the Hydra-Matic, was developed by General Motors and introduced in 1939; it was a massive selling point for Oldsmobile cars.
- Some modern heavy-duty trucks have transmissions with up to 18 different gear ratios to handle massive loads on steep inclines.
Explore more words
drivetrain, powertrain, Transmit, differential, Communicate, telemetry
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