ZF 8HPxx - TEMIC Gearbox Performance Tuning File Stage 1The 8HPxx Gearbox has a Max Torque from 8HP45 450 Nm 331 lbft 8HP50 51 500 Nm 368 lbft 2014 2019 8HP70 700 Nm 516 lbft 8HP75 750 Nm 553 lbft With This TCU Software Upgrade it will have a Max Torque from +100Nm and better shifting times. More Torque NM Better Shifting times Smoother Shifting Higher RPM Limiter TCU Software Modifications Stage 1 : RPM Limiter change Max Torque Limiter and Torque Map Minimum RPM and Max Rpm for Upshifting Minimum RPM and