So I want to install a Aux cooler on this Juice box of an auto tranny on my new project, I know bummer it's an auto, my question is which line is the in and out on the tranny?
Since you insulted my slush box I'm want to say the one on the right the passenger side. Or maybe hook lines up to it, hold one to each ear and have someone start it and run it though the gears. You'll find out which one is pumping the fluid.
I'm sure you'll find something to burn me on in Moab so I guess I'll be nice. It should be the one at the front of the housing.
You must be hooking up a filter too if you're worried about in/out? For a cooler, does it matter? I just hooked mine up last week & didn't pay any attention.
It only matters if you are tying into the factory radiator setup!For most of us thats a pretty good setup.If your doing a "separate" system then the newer design coolers can really shed some temperatures!
Mark'
IIRC the one that kicks in to the upper fitting on the rad is the hot side coming from the tranny.
It's easy to confirm on your set up if you can start it up. Fire up the motor and with your foot on the brake put the Jeep in drive and bring the revs up to about 1000-1200 or so for a little bit and then take a feel of the lines.
The one you can't hold onto very long is the one you want.
IMHO, ANY vehical with an Automatic transmitton should UNhook from the radiator cooler and just run a seprate cooler for the tranny.
The problems of ATF and Antifreeze/water, mixing are more then anyone wants to deal with and can KILL your tranny in an instant.
Not to mention your engine transfering heat to the radiator and then your radiator passing that heat to your tranny. both before and after total warmup.
just my $5
When a fluid propels MY ass, then I know I am getting old.
Do what I did ,, cut both lines , start Xj in park , see which one shots fluid, shut down xj ASAP!
It is the top line running into the rad is the hot side from the tranny, the bottom is the cool return ...... been running a stand alone cooler for a couple years seems to work well
memory doesnt serve me, but if it did im pretty sure its the bottom line. i figured it out by driving on a long trip then feeling the hoses to see which was hotest.