myjk

I am just about to put in a trany cooler and need to know the flow direction of the oil so the stock cooler gets it first then after market cooler last. this should get the best out of the cooler.

Is it the rear upper line off the trans?

Or

The lower front line off the trans?

grnjkrubi

I am getting ready to do the same intall and it should be the upper line.

ronjenx

At the transmission, and at the cooler:

Lower line carries fluid from transmission to the cooler.

Upper line carries fluid from cooler to transmission.

Flash1034

So it fights gravity? Are you sure thats right?

Flash

TROUBLESHOOTER

To know for sure... Let the Jeep sit and completely cool down (over night maybe). Start the Jeep, put in Drive with brake applied (so you don't move), let Jeep idle for 3 minutes, put in park , turn off Jeep, feel fluid lines on trans, the warm one is the send line, the cold one is the return line.

redrunner

I put together a diagram: http://home.comcast.net/~kingslea1/Jeep/Tranny.pdf

JEEP THRILLS

gravity isn't a concern, it takes from the bottom line because thats were the oil is

Flash1034

What cooler are you guys putting on? Is there a provision on the tranny for a tranny temp gauge?

Flash

ronjenx

There is a provision for a temp gauge. It's called the AeroForce Interceptor. It plugs into the OBDII port under the left dashboard. Amoung the many things it will display is tranny sump temp.
Otherwise, you should install a probe in the pan and a gauge for it.

myjk

Thanks for the info it Will make my day easy knowing which line to cut.