I guess there is some internal damage. did many drains/fill but the symptoms keep coming back once the car is warm. Hard downshifting like someone has hit u from the back. and then after driving for 10 minutes, it wants to stall at traffic stop. i guess this isn't electrical issue or fluid issue, just a crappy Aisin transmission.Will have to wait until the price of these transmissions drop or the lawsuit action results in some action. Will lee it in my garage for now.

128k
05 cooper s
6-speed automatic transmission
Purple Royal ATF

 

If the car goes into neutral for a long period of time and you get a code it probably has some internal damage to your trans. a seal breaks loose and blocks fluid to the clutch packs and damages them... but if it shifts hard with a slight flare between shiftss i would look into a new valve body for your trans hard shifting issue. that's where i would start. good luck.