Yes. I can't remember the exact code, but basically it was some kind of ratio error that meant something was slipping. I had these especially during kick downs from 5 to 4; merging on the interstate was the worst and would almost always end in a transmission malfunction message on the idrive and end in me having to pull over...

Since doing the solenoids I have not had a single transmission code and it shifts better than it ever did before. It's not the 100% fix for everyone, but it has fixed a lot of problems for a lot of people over on bimmerfest

Awesome, thanks for the response. It looks like I'll be next to tackle this one. What's strange is that I have yet to get any failsafe modes engaged when I drive the car (knock on wood) My wife gets it almost every time, and from the way she describes it, it sounds like it's during the 5-4 downshift.

I've cleared fault 4F85 multiple times now, which is ratio monitoring for the E-clutch. I know that the shaft portion of the E-clutch is a mechanical weak point in this transmission, but I still think my problem has to do with the valve body.

At this point I'm debating whether or not I should do just the solenoids or throw a whole new Mechatronic in there. Obviously there's a signficant price differential, so we'll see.

Inpa
 

inpa does this in just a few seconds, I rebuilt my mechanics unit and mine it's right in the menu.. its easy as starting your car