I understand that to remove the max ATF for a drain & fill process (without disconnecting hoses) - with the engine running you shift from D to P or D to R to P in order to get max fluid flowing through the torque converter which in turn gets the most fluid to drain . *My question is do you do this sequence before you release the ATF drain plug below OR do you perform this sequence with the engine running and the ATF drain plug removed ? I want to get the max fluid out during a ATF drain and fill but of course do not want to hurt the transmission ... Thanks in advance for replies .