Word forms: (regular plural) drive trains
(Automotive engineering: Vehicle components, Engine, transmission, and exhaust)
Each spark plug operates in a continuing process that puts power into the drive train and propels the car. The drive train of a vehicle is formed by the components that are responsible for transferring power
to the drive wheels. Front-wheel drive means that your front wheels are connected to the drive train, and they pull you along as you drive.
Collins English Dictionary. Copyright © HarperCollins Publishers