UNITRONIC AUDI RS4 2.9TFSI EA839 TCU PERFORMANCE SOFTWARE

- 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.