Throughout this site we use many technical terms, and given the breadth of readership our site enjoys, sometimes we are remiss and incorrectly assume everyone knows what we are referring to. For those that do not, here are some explanations of the technical terms use.
Automatic alternative to the conventional clutch and gear lever transmission. It is operated by hydraulic pressure from an oil pump acting on an epicyclic gear train that is sensitive to throttle opening. Gears are changed automatically as engine load varies. Such transmissions are usually fitted with a means of holding on to one particular gear when desired. On more sophisticated models there is a manual override control which permits the driver to change gear by hand despite the absence of a clutch.