trans cooler

[7.3HeavyHauler]

this may be a silly question but i was not able to find my answer so on the trans cooler which side is the supply and return, i found a trans cooler that i had on my previous truck and its practically new, might be 30K miles on it but you would never know by looking at it, my theory behind this is adding it to the system, the factory cooler would be the first cooler and then into the one i am adding which after its mounted will be behind the bumper where the license plate is supposed to be, in Indiana you only get one plate for the rear

[Turbostang500]

this may be just as silly of a response, but would it really matter which is the inlet and outlet?

I would assume you are just gonna tie it in on each end and be done unless this cooler has a thermostat on it or something.

Other than that, I didn't know there was a difference in which way they flow.

[7.3HeavyHauler]

i can answer that, i want the factory one to be the first cooler that the fluid goes to, then it would go through the other one which will be behind the front bumper which will be subject to fresh air because it will be mounted behind the bumper in that same opening that is your license plate is in. theres probably alot of people wondering why i am doing this, i could possibly be getting back in to towing again this is just a little added insurance.

[SuperCrutyPS]

Maybe call a trans shop and ask which is the outlet and which is the inlet on the side of the tranny. You could trace the tubes/hoses from there. Just a suggestion.

[Turbostang500]

Sorry! Lol

I blew right over that part in the first post and it makes sense for what you are wanting.

Well, I guess with that info, my post is completely helpless! Haha

Might make a little mess but if you remove both lines and then had someone start the truck (and braced to shut down immediately), you could see which line has oil come out of it. That would be the input to the cooler.

[7.3HeavyHauler]

That's my last resort, not in too big of a hurry right now but thanks

[INFRNL]

EDIT: I did a quick search and the supply line should be the front line near the pump and the rear should be the return. Google is your friend.

I do not have your answer but it should be fairly easy to figure out. Maybe take a look to see where the lines hook up on the tranny. I think the return will dump back in near the pan. I believe it will be the front most line.

[acelefty]

Why not run the truck and then hit each line with an infrared thermometer and see which one is hotter?

[jesilvas]

Shoot, just leave one unhooked, have someone crank it and see which way it flows

[7.3HeavyHauler]

um my infrared thermo-meter is still at the store and my redneck standby thermo-meter (wife) won't grab the lines to find out which one is hotter.