Features
- Unitronic Engineers identified gearbox originating torque limitations on the TCU side of the AL552 transmission. In order to overcome these limitations, while ensuring proper torque management and operation, a TCU Performance Software was required to run Unitronic Stage 1, 1+ and Stage 1+ E85 ECU Performance Software for the B9 RS 4 & RS 5.
Stage 1 TCU Performance Software calibrations necessarily increase the torque limiter for seamless torque management and harmonious operation with the corresponding Unitronic ECU calibrations and further enhance the user experience.
For MY2022+ vehicles, TCU tuning is not required as Unitronic has developed special ECU Performance Software which incorporates a proprietary "gBX" solution. These "gBX" ECU calibrations were developed specifically for MY2022+ vehicles and allow Unitronic to deliver a full torque experience without transmission tuning.