I've been hearing a lot of info about these transmissions. And am getting more data on what might be wrong with mine.

AMG, Rennetech, etc make modified valve bodies that allow the tranis to always start with 1st, and some AMG cars got the p928 valve bodies which are not the same mod.

my *car* will not always engage 1st even if I have the shift lever in the 'B' position. Occasionally it will slip into 1st but its not a given that it will even from a stop. What might this symptom indicate?

I'll be taking it in to a A/T professional soon, since it seems more than just an adjustment. Unless one of you Star (pun intended) has a suggestion????

Thanks
Eric