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 automatically transmissions have a defined set of gear ranges, often with a parking pawl feature that locks the output shaft of the transmission.

Similar but larger devices are also used for heavy-duty commercial and industrial vehicles and equipment. Some machines with limited speed ranges or fixed engine speeds, such as some forklifts and lawn mowers, only use a torque converter to provide a variable gearing of the engine to the wheels. 

Besides automatics, there are also other types of automated transmissions such as continuous variable transmissions (CVTs) and semi-automatic transmissions, that free 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 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 clutch to manage the connection between the transmission gearing and the engine. In contrast, a CVT uses a belt or other torque transmission schema to allow an “infinite” number of gear ratios instead of a fixed number of gear ratios. A semi-automatic retains a clutch like a manual transmission, but controls the clutch through electrohydraulic means. 

A conventional manual transmission is frequently the base equipment in a car, with the option being an automated transmission such as conventional automatic, semi-automatic or CVT. The ability to shift gears manually, often via paddle shifters, can also be found on certain automated transmissions (manumatics such as Triptonic), semi-automatics (BMW SMG), and continuous variable transmissions, CVTs, such as Lineartronic. 
In Paramount Transmission, we have the knowledge and experience to fix all your transmission problems.
 
Basic Parts of a Transmission
While there are many, many little parts inside, your transmission is essentially made up of a few key parts of systems.
  • Bell Housing: this is the cone shaped metal case that you can see when you peek underneath your car. If you have a front-wheel-drive car it’s stuck on the side of the engine under the hood. If your car is rear-wheel-drive, the transmission will be mounted underneath the car behind the engine.
  • Gears: even though you are not shifting them, an automatic transmission has gears. They are broken into main gears and planetary gears. You need all of these to be able to drive.
  • Fluid: transmission fluid is very important to an automatic transmission. All of the magic happens in the fluid. Most cars come with the red transmission fluid, good to know if you are looking for a leak. 
  • Filter: all of that fluid has to be clean for your car to shift gears at the right time. To keep things fresh, your transmission has a filter to catch any gunk.
Let the expert technicians of Paramount Transmission to check your transmission and give a FREE quote. 
For any questions call (562) 630-1701 or (562) 577-5205 (cellular).
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