https://docs.emtronaustralia.com.au/transmission-control/tuning/transbrake/index.htmlWarning Transbrake is a motorsport orientated function can lead to transmission and/or other driveline component damage if not used correctly. The Transbrake function locks up the transmission so that engine load can be applied against the torque converter for staging and launching. It works by applying additional clutches along with the clutches required for the current forward gear. Typically this is achieved by engaging Reverse and First gear at the same time, effectively binding the transmission.Hugoen-us