VAG VL300 Gearbox Performance Tuning File Stage 1VAG VL300 Gearbox Performance Tuning File Stage 1 A CVT Gearbox with good performance and comfort. We can provide the Gearbox with more Torque by modifying the TCU Software. Quicker Shift Speeds Shift speeds can be increased by up to 20%, this reduces lag and improves acceleration. The quicker shift speeds will also give a smoother transition between gear changes and improve paddle shift response time. RPM Limits & Shift Set Points RPM limits and