https://docs.emtronaustralia.com.au/engine-management/vehicle-specific/nissan-r35/nissan-gtr-r35-tcm/index.htmlTCM Setup Nissan Transmission Control Module (TCM) The transmission control module is responsible for anything related to the transmission. The ECU does not control any part of the transmission, However, it is responsible for obeying torque requests accurately which are sent to it via the CAN bus.Hugoen-us