[ddvk]

Actually, pumping out 2Q and refilling will result in mixing of old and new ATF in the Torque Converter.

The way I do it is, drop the pan which will drain 4 to 5Q out. Put pan back and overfill with fresh ATF by 1 or 2 Q. Then flush via return line till 5Q is out while going over each gear for 20sec. Then fill 5Q via the dip stick, reconnect return line and check levels.

This method results in 90% exchange. Filling in 2Q and stopping will result in more mixing of old and new ATF, not a good idea.