not an engine, but (in the name...) a transmission - a mechnism for transmitting power from the engine to the wheels. normally cars use a gearbox (automatic or

not an engine, but (in the name...) a transmission - a mechnism for transmitting power from the engine to the wheels. normally cars use a gearbox (automatic or manual) and possibly a driveshaft (to connect to the wheels that are at the other end from the engine.)