You don't want to run an AWD audi box as a FWD only box because the front output shaft runs inside the counter shaft. It's small only meant to see a max of 40% torque by design. In a FWD only trans, the counter shaft itself drives the ring and pinion so it's designed for 100% torque. However, you can run an AWD as a RWD trans (if your engine is up front) with a locked center diff and they'll hold 800+hp.