What Is An Automatic Transmission?

 

An automatic gearbox is one type of motor vehicle transmission that can automatically change gear ratios as the vehicle moves, freeing the driver from having to shift gears manually. Most automatic transmissions have a defined set of gear ranges, often with a parking pawl feature that locks the output shaft of the automatic transmission. Besides automatic transmissions, there are also other types of automated transmissions such as continuous variable transmission (CVTs) and semi-automatic transmissions, that free up the driver from having to shift gears manually by using the transmission's computer to change gear, if for example the driver were redlining the engine. Despite superficial similarity to other automated transmissions, automatic transmissions differ significantly in internal operation and driver's "feel" from semi-automatics and CVTs. An automatic uses a torque converter instead of a clutch to manage the link between the transmission and the engine, while a CVT uses a belt instead of a fixed number of gears, and a semi-automatic transmission retains the clutch like a manual but activates the clutch through electrohydraulic means.

A conventional manual transmission is frequently the base equipment in a car or truck, with the option being an automated transmission such as a conventional automatic transmission, manumatic transmission, semi-automatic transmission , or CVT transmission. The ability to shift gears manually, often via paddle shifters, can also be found on certain automated transmissions (manumatic such as Tipronic), semi-automatics (BMW SMG), and continuous variable transmissions (CVTs) (such as Lineartronic).

Sergeant Clutch Discount Transmission Repair Shop in San Antonio, Texas is a family owned and operated transmission repair and auto repair shop delivering　integrity, competence and professional automotive repair, clutch repair and transmission repair services in San Antonio and surrounding areas.