Im installing a tranny cooler on my 08 Alpha. Looking at the OEM lines up by the cooler just at the front of the motor. One line has a tag that has in on it the other has out on it. Im wondering which one is the input to the cooler from the tranny.
I think we figured out in/out by briefly starting the truck and seeing which one spit out fluid.
I think I remember it being the one on the drivers side that pumps fluid into the radiator/cooler.