The top line is always the return line, The cooler has to fill from the bottom or the fluid would get airated.
The transmission cooler lines are located coming from the radiator on the bottom. One is for the sending and the other for return. The lines are high pressure, just as your radiator hoses are when the car is running. The lines go from the radiator to the top of the transmission.
Connected to the bottom of the radiator you will see 2 lines. One is the inlet and one is the outlet. The cooler line is the return (outlet) line.
BOTTOM
Bottom
I don't have a schematic for the radiator, but I believe the IN is the bottom hose on the radiator, and the OUT is the top.It really shouldn't matter because it is just a loop through the radiator.Take Care,Greg
Although I am not familiar with the vehicle in question specifically, generally the line that goes to the top side of the radiator is the supply, and the line from the bottom of the radiator or trans cooler is the one returning the fluid to the trans.
Pressure and return lines that goto radiator and or transmission cooler to keep the ATF chilled off.
You will notice two lines going to your radiator from the transmission. One is a service line and one is a return line. The radiator has a transmission cooler built into it. If you have trans fluid in the radiator chances are the trans cooler is leaking. A little trans fluid in the radiator will not affect engine cooling BUT as soon as the pressure drops in that transmission you may very well have radiator coolant sucked into the tranmission and that will ruin a transmission in a hurry. You need to get this checked out as soon as possible.
The hose that goes from the overflow to the bottom of the radiator on a 2002 Windstar is the bypass hose. It allows coolant from the overflow to return to the radiator as it cools.
There are 2 lines. The return line is the line that is the the coolest after running the car. Usually the top line.
Yes, pressure and return cooler lines.
It should not matter as one is pressure and the other is return from the transmission oil cooler.