Unitronic Engineers identified gearbox originating torque limitations on the TCU side of the AL952 trasmission. In order to overcome these limitations, while ensuring proper torque management and operation, a TCU Performance Software was required to run Unitronic Stage 3 ECU Performance Software for TTE1020 Turbochargers. Stage 3 TCU Performance Software calibrations necessarily increase the torque limiter to 1300Nm for seamless torque management and harmonious operation with the corresponding Unitronic ECU calibrations and further enhance the user experience. Unitronic software is flashed directly through the (OBDII) diagnostic port of your vehicle (10-15 minutes). Features: Engineered with Strict Industry Standards Extensively Tested Under Various Driving Conditions Optimized Responsiveness and Drivability Optimized Smoothness and Driving Comfort What's Included: Unitronic Stage 3 TCU Transmission Tune Unitronic UniCONNECT+ Cable (OPTIONAL)