trinituner.com

hey guys,
been searching around and cant seem to find this info. i recently installed an external ATF cooler on my D15b 4 speed tranny. Im not sure if its properly cooling the fluid so im looking to install an oil temp gauge. my question is, which of the AFT cooler lines is the return?

disconnect the transmission hoses then have sum1 start the car while u look to see which hose oil is comin out from(turn off the car as soon as u see it so u dont drain ur tranny of fluid)...that hose will be the supply so the other 1 will be the return.

the line on the right if ur facing the car should be the return line. (d15 non cvt)

need a tranny for a B15b engine