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What Is DSG Tuning? Understanding Audi's Dual-Clutch Transmission Calibration Audi's DSG (Direct Shift Gearbox) and S Tronic transmissions are among the most capable dual-clutch units in the automotive world. Built by BorgWarner (wet-clutch variants) and used across the VW Group, these transmissions handle enormous torque loads while delivering shift speeds that rival purpose-built race gearboxes. But factory calibration is conservative by design — tuned for emissions compliance, NVH refinement, and component longevity across all climates and driving conditions. DSG tuning recalibrates the mechatronic unit (the transmission's integrated computer and hydraulic controller) to deliver faster shifts, higher torque limits, optimized launch...