I have replaced the heat exchanger involving the lost of about half a cup of tea which was contained in it. When checking the transmission fluid level for topping at 41 degree celcius (starting the car and moving lever between P, N & D) another half a cup of tea popped out from the tranny fill opening.

What are the consequences when a tranny contains an excess amount of oil?

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X5 3.0i SUV
2005 -113000 miles
GM-A5S 690R Tranny