This may be a silly question, but it's one I must ask. How many quarts of transmission fluid does a transmission actually hold? And what's the average that comes out during a standard drain & fill?
Just finished my third drain / refill of ATF on our 2012 EX-L V6 Accord. Yup, like @Hudouc says, about 3-1/2 quarts drained out each time. I measured this using a marked, graduated jug.
We're using Idemitsu ATF H-Plus (it's Idemitsu's specific offering for Honda ATF DW-1).