Gday every one,

Im still hoping to fit my tranny cooler before too long. I got the tranny cooler kit from RPW which hooks up with the existing radiator tranny cooler section to work in a series. In the fitting guide, it says to hook up the tranny cooler to the return line. I know which are the two tranny fluid lines going to the radiator, but what I need to know is which one is the return line? You'd think you could tell be simply feeling them and seeing which is cooler, but for some reason the surface temp of both lines are about the same, even if I hold my finger on both lines while the car warms up. If any one knows which is the return line out of the two that would be a huge help, does any have a haynes or gregory service manual that would say?

Cheers.