Car Transmission

An automatic transmission (often informally shortened to auto, and abbreviated to AT) is a motor vehicle transmission that can automatically change gear ratiosas the vehicle moves, freeing the driver from having to shift gears manually. Similar but larger devices are also used for heavy-duty commercial and industrial vehicles and equipment.

Most automatic transmissions have a defined set of gear ranges, often with a parking pawl feature that locks the output shaft of the transmission. Continuously variable transmissions (CVTs), which are very different to conventional automatic transmissions, can change their ‘ratios’ over a wider ’stepless’ range, rather than between a set of fixed gear ratios. CVTs have been used for decades in two-wheeled scooters; but have only seen use in a few automobile models. Recently, however, CVT technology has gained greater acceptance among manufacturers and customers, especially in Audi and Nissan automobiles, and gas-electric hybrid vehicles. (more…)

An automatic transmission also known as “Auto transmission”. An auto transmission is an automobile gearbox that can change gear ratios automatically as the vehicle moves, freeing the driver from having to shift gears manually. Similar but larger devices are also used for heavy-duty commercial and industrial vehicles and equipment.

Most automatic transmissions have a set selection of possible gear ranges, often with a parking pawl feature that will lock the output shaft of the transmission. Continuously variable transmissions can change the ratios over a range rather than between set gear ratios. Continuously variable transmissions have been used for decades in two-wheeled scooters but have seen limited use in a few automobile models. Recently, however, CVT technology has gained greater acceptance among manufacturers and customers, especially in Nissan automobiles and gas-electric Hybrid vehicles.

Some machines with limited speed ranges or fixed engine speeds, such as some forklift trucks and lawn mowers, only use a torque converter to provide a variable gearing of the engine to the wheels.

The need for a transmission in an automobile is a consequence of the characteristics of the internal combustion engine. Engines typically operate over a range of 600 to about 7000 revolutions per minute although this varies, and is typically less for diesel engines, while the car’s wheels rotate between 0 rpm and around 1800 rpm.

The engine provides its highest torque outputs approximately in the middle of its range, while often the greatest torque is required when the vehicle is moving from rest or traveling slowly. Therefore, a system that transforms the engine’s output so that it can supply high torque at low speeds, but also operate at highway speeds with the motor still operating within its limits, is required. Transmissions perform this transformation




By: sara

An automatic transmission is an automobile gearbox that can change gear ratios automatically as the vehicle moves, freeing the driver from having to shift gears manually. Similar but larger devices are also used for heavy-duty commercial and industrial vehicles and equipment.

Most automatic transmissions have a set selection of possible gear ranges, often with a parking pawl feature that will lock the output shaft of the transmission. Continuously variable transmissions  can change the ratios over a range rather than between set gear ratios.

The modern automatic transmission is by far, the most complicated mechanical component in today’s automobile.  Automatic transmissions contain mechanical systems, hydraulic systems, electrical systems and computer controls, all working together in perfect harmony which goes virtually unnoticed until there is a problem.

The auto transmission consists of many components and systems that are designed to work together in a symphony of clever mechanical, hydraulic and electrical technology that has evolved over the years into what many mechanically inclined individuals consider to be an art form. 

Auto transmissions are easy to use. In the past, automatic car transmissions had a number of problems; they were complex & expensive, and had reliability problems which sometimes caused more expenses in car transmission repair. With the advancement of modern automatic transmissions that has changed.

Mostly general transmission service provider will install transmission system which has higher cost and no warranty. But the Transmission911 assures customer to install the branded transmission system with nationwide warranty.

Transmission911 based in Houston, Texas saves your time & money by providing right transmission for your car. Foreign and domestic transmission installation and replacement are done at transmission911 for any make and model of car.




By: sara