through the oil filler cap on top of the motor
?
You do not change the trans fluid. It is a life time synthetic fluid.
Put in 8qt's.
5w -30
90 litres
5.8q-6q
5w30
Depending on the amount of miles and is it leaking any type of oil from it if it is leaking fluid it should be replaced most aftermarket places recommend replacement at about 20k
4 qts
5W30
32/1
5 quarts