Cars equipped with an automatic transmission also have a gearbox controller which is responsible for supervising the correct operation of the transmission. This is a component that reads data from a number of sensors in the car; it also works directly with the engine controller. Modern gearbox controllers manage the shift lock of the gearbox; they also supervise the work of solenoid valves which are activated in order to change the gear ratio. There are also hydraulic components in the automatic transmission system so the controller will monitor the pressure to allow smooth gear changes.

What are the functions of the gearbox control unit?

The gearbox controller receives a lot of information from various parts of your vehicle; it will be, for example, information about the speed at which the vehicle is moving, the speed of rotation of the wheel or the ratio of the throttle. It also reads the temperature of the transmission fluid; in this case, if the fluid becomes too hot then the system can reduce gears; in addition, it will also monitor the fluid pressure through the appropriate setting of the solenoid valve. Additionally, it can also supervise the operation of the cruise control; in the event of its activation it can eliminate unexpected changes of gear by the driver; furthermore, the cruise control will receive information from the gearbox controller about the current gear ratio.

Basically, it is a component that integrates multiple control systems, thanks to which it will be possible to reduce fuel consumption and improve gear shifting. In addition, the module will supervise the Start-Stop function, i.e. switching off the engine when stopped at traffic lights, which will reduce fuel consumption.

In the event of a damage to the gearbox controller, it should be replaced with an original controller; therefore, is should be matched to the model and year of production of your vehicle. It is worth noting that there are many drivers in the market which are apparently similar to each other, but you should choose a model that will support the type of transmission intended for your vehicle. Different models can be found here: Original gearbox control unit – we have the largest selection of gearbox controllers as well as many other components.