I wish it was that easy lol. I of course used the factory wiring harness but Audi, being the geniuses they are, figured out a way to tell the ECM and TCM that they were no longer in the vehicle (series of sensors in the motor mounts etc.). It causes an IMMO scenario. Nothing works. No spark, no fuel, no shifting. You have to "Kill IMMO", its a program that Audi dealers have. Nobody local can do it but I found a gentlemen in New Hampshire that is an Audi expert. He was able to program my TCM and ECM to kill IMMO. While he was programming, he went ahead and added a stage 2 tune, more aggressive timing and fuel curves.
The major problem with the trans is that it relies on 2 rear speed sensors to make sure the front drive train and rear drive train are in sync. You cant use the rear sensor because it is in the diff but you can use the mid sensor (the one I'm using). This at least allows the TCM to function with a signal. If you burn tires (easily done) the "rear" of the vehicle isn't moving as fast as the front so the TCM will take power away from the front to add to the rear. It jerks the trans and makes it down shift. If you ease into the power, its runs fine but sometimes you just want to light em up!
Another problem I have is that they don't make a LSD for this trans. When I punch the throttle, one tire will spin while the other one kinda skips. I don't plan on doing donuts but even merging onto a freeway or something could get dangerous.