Key takeaways An engine remap can push more torque through a gearbox than it was designed for. A gearbox tune changes shift speed, clutch pressure and torque limits, and should match the engine tune. Tuners quote different torque limits for each type of DSG, so find out which gearbox your car has. Fluid changes matter even more once the car is tuned. Most people think of chiptuning as an engine job. But if your car has an automatic or DSG gearbox, that gearbox has its own computer, and it has to cope with the extra power too. What a gearbox tune changes A gearbox remap, often called a TCU tune, adjusts how the gearbox behaves. Tuners say it can raise the torque limit, change shift speed and timing, increase clutch pressure so the clutches do not slip, and alter launch and gear selection. The result is meant to be a gearbox that suits the new engine settings. Why it matters If you tune only the engine, the extra torque can make the clutches slip and wear faster. The gearbox computer...
Chiptuning and ECU remap guides: how it works, what you can gain, the risks and how to choose a good tuner.