Powertrain is system which generates and transmits power.
In most cars the powertrain includes:
- engine
- clutch
- gearbox
- final drive
- differential
- driveshafts
- wheels & tyres
The powertrain may also include:
- torque converter (if an automatic transmission is fitted)
- propellor shaft (for rear-drive or four-wheel drive vehicles)
- transfer box (for four-wheel drive vehicles, as shown above)
Powertrain is sometimes taken to mean the engine/gearbox assembly only.
See also: drivetrain
