Usually attached to the engine and needed to enable the wide range of speeds
required of a modern vehicle, from crawling around town to cruising motorways.
The word gearbox is generally used for a manual while the word transmission
usually describes an auto.
A manual gearbox has between four and six speeds while autos have anything from
four to eight speeds.
Most modern electronic autos also have a manual-shift function, enabling the
driver to change gears via the main centre shifter or with steering wheel
These are often misleadingly called semi-automatics but should perhaps be