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There are many problems with this article. Please help improve it or discuss them on the talk page. (Learn how and when to remove these message templates.) Additional quotes are required to validate this article. Please help improve this article by adding citations to reliable sources. Unauthorized material may be challenged and removed. Find sources: External Box Control Unit News * Newspapers * Books * Scholar * JSTOR (December 2013) (Learn how and when to remove this news template) The opening section of this article may be too short to adequately summarize the main points. Consider expanding your lead to provide an accessible overview of all the important aspects of your article. (Jan 2020) (Learn how and when to remove this message template) A Transmission Control Unit (TCU), also known as a Transmission Control Module (TCM) or Transmission Control Unit (GCU), is a type of automotive ECU used to to control. electronic automatic gearboxes. Similar systems are used with various semi-automatic transmissions, only for automation and clutch control. A TCU modern automatic transmission typically uses sensors from the vehicle as well as data provided by the engine control unit (ECU) to calculate how and when to shift the vehicle for optimal performance, fuel economy and shift quality. 1 History Since the late 1980s, the design of electronic automatic transmissions has changed from purely hydromechanical to electronic control. Development has been iterative since then, and today the designs come from several stages of automatic transmission electronic control development. The main part of these control units are the transmission solenoids. The development of the modern automatic transmission and the integration of electronic control have made great progress in recent years. The modern automatic transmission is now able to achieve better fuel economy, reduced engine emissions, greater reliability of the shift system, better shift feel, better shift speed and better vehicle handling. The vast range of programmability offered by the TCU allows the use of a modern automatic transmission with the right transmission parameters for every application. In some applications, the TCU and ECU are combined into a single unit as the Powertrain Control Module (PCM). Input Parameters A typical modern TCU uses signals from engine sensors, automatic transmission sensors, and other electronic controls to determine when and how to shift 2. More modern designs share input or derive information from ECU inputs, while older designs often have their own dedicated inputs and sensors in engine components. Modern TCUs have such complex designs and perform calculations based on so many parameters that they are infiniteThere are many problems with this item. Help improve it or discuss it on the talk page. (Learn how and when to delete these message templates) This article requires additional citations for verification. Please help improve this article by citing reliable sources. Unauthorized material may be challenged and removed. Find sources: Transmission Control Unit News * Newspapers * Books * Scientists * JSTOR (December 2013) (Learn how and when this news template may be deleted) The introductory section of this article may be too brief to adequately summarize the main points. Consider expanding your lead for an accessible overview of all the important aspects of your article. (January 2020) (Learn how and when to delete this message template) A Transmission Control Unit (TCU), also known as a Transmission Control Module (TCM) or Transmission Control Unit (GCU), is a type of vehicle ECU that an electronic automatic for controlling transmissions. Similar systems are used on various semi-automatic transmissions for clutch automation and actuation only. A modern TCU automatic transmission typically uses vehicle sensors as well as data provided by the engine control unit (ECU) to calculate how and when to shift the vehicles gears for optimal performance, fuel economy and shift quality. 1 History Since the late 1980s, electronic automatic transmissions have evolved in a variety of configurations, from purely hydromechanical to electronic controls. Since then, development has been iterative, and today the designs come from multiple stages in the development of electronic automatic transmission controls. Transmission solenoids are a key component of these ECUs. The development of modern automatic transmissions and the integration of electronic controls have made great progress in recent years. The modern automatic transmission is now able to achieve better fuel economy, reduced engine emissions, greater reliability of the shifting system, better shift feel, shift speed and vehicle handling. The extensive programming options of the TCU enable the use of a modern automatic transmission with the right transmission parameters for every application. In some applications, the TCU and ECU are combined into a single unit as a Powertrain Control Module (PCM). Input Parameters A typical modern TCU uses signals from engine sensors, automatic transmission sensors and other electronic controls to determine when and how to shift gears 2. More modern designs share inputs or receive information from inputs to the ECU, while older designs often have their own dedicated inputs and sensors on engine components. Modern TCUs have such a complex design and perform calculations based on so many parameters that their number is infinite

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