A chassis is an underlying supporting structure. A traditional chassis gives the vehicle structural strength, whereas modern vehicles integrate the bodywork into a single unit with the chassis so that the body becomes part of the structure of the vehicle rather than just an external skin.
When changing gears in a manual transmission, a stick shift and selectors are utilized. On a read-wheel drive vehicle the stick shift is normally mounted directly into the transmission itself. In other vehicles, the stick shift can be attached to the steering column.
