My Highlander is due for several maintenance items, and one of those things is a cooler line ATF flush. It has the U241 Aisin tranny, but my question is which side of the radiator is the "in" from the tranny and "out" to the tranny after being cooled.. the driver side or passenger side. I'm going to be using T-IV fluid that I already have and got for a good price, though I might use the T-IV for my Tacoma since it might be still under warranty? (Isnt powertrain 5Y/60k?) If I don't use the T-IV I'm going to use Castrol Import. Anyone know off the top of their head which side of the rad to pull the hose off? Thanks in advance!