You can only drain about a half of total ATF capacity athose in the torque converter and some in the valve body can’t get drained. Usually 3.75 quarts (room temperature) is for a simple drain-and-fill. 4.1 ~ 4.2L / 4.3 ~ 4.4 quarts to refill with the filter change seems to be on the low side from the reports we’ve seen.
Did you keep the engine idling when you check the ATF level? If you didn’t, the ATF level will be higher, hence the low-fill.
You should get something like Forscan live data tool recommended here by
@edmaz for more accurate ATF temperature readout:
Guide ATF Drain/Fill
Anyone found an OBD2 phone app that will read transmission fluid temp?
Here
@FerrariF1 did an experiment and found the differences on ATF level in different ATF temperatures on his CX-5 with 2.5T:
View attachment 321005
Since we can only drain a half of the ATF, many would do 3X ATF changes to get about 87.5% of fresh ATF in transmission. Yes you can do 2 additional simple drain-and-fills with some miles in between. And check any possible leaks while you’re there.