I had many of these behavior problems with my 04 4.8. Last week had the car at the shop where the district BMW man determined that the problems were related to DME software and not trans s/w. They reflashed the DME and I have yet to see any of the problems reoccur. I am keeping my fingers crossed as this just seems too easy. Good luck. BTW the dealer was not willing or authorized?? to do this w/o prior district approval.