Just so you guys know, my 3.62 is running perfectly and shifts in D mode perfectly as well. Im in Cali right now testing my car.
This is very important though, BMW made 2 different diff covers for the M3. One for the Mt(bigger) and one for the DCT(smaller). Why? , I dont know. BMW has 2 different part numbers for the diff cover DCT and MT. I had a problem where the stock DCT diff cover did not work with the 3.62 and I needed a MT diff cover to go on my diff cuz the DCT cover was to small. I dont have enough time to explain but you guys get the idea. Nobody knows this since they had never tested the DCT 3.62.
I'll post the full details later. Worst case, you'll need to order a MT diff cover from BMW ($430).