A drivetrain is a complex arrangement of vehicle parts and components, including an engine, transmission, drive axles and differentials, which work together to deliver power and torque generated by the engine to the drive wheels.
Depending on the design of your vehicle, it can be equipped with either an automatic or manual transmission.
A manual transmission is a system of gears and shafts, which requires the driver to select the desired gear with a manually operating gear stick. Engine power is transferred to the transmission via a clutch, which, in turn, delivers the power to the wheels via the differential and drive shafts.
An automatic transmission does the same job as its manual counterpart, but doesn’t involve the driver to operate it manually. It features a set of gears that are changed automatically based on the speed of the vehicle and driving conditions.
An engine is a heart of a vehicle. It converts chemical energy into mechanical one, which moves the vehicle towards or backwards. It burns an air/fuel mixture that is ignited inside the cylinders, resulting in a series of controlled explosions that force the pistons up and down. Attached to the crankshaft with connected rods, the pistons cause the crankshaft to spin. The latter transfers the power to the drive wheels via the transmission.