Effect of temperature on ATF volume
Have been looking for a chart which gives information on this for some time and finally found one for Dexron III. I calculate that if the trans holds 9 litres of ATF, it will increase in volume by 135cc for every 20 degrees C of temperature gain. That's only a tea cup full. But it is the top and bottom temp as specified in the filling procedure. And the cups can add up
http://www.viscopedia.com/viscosity-...ion-fluid-atf/
Oct '00 E46 330i. Feb '92 525i (departed)