I have the TH700 like every one else here does.
There are 2 lines coming out of the side of the trans for the cooler. A top and bottem line.
I don't know wich ones is the feed and wich one is the return.
Need to know because I have a real big hydraulic filter I want to toss on there for extra filtration. It helps when the fluid flows the right direction. Plus the lines are worn flat in a few places so they need to be tossed.
This is for my diesel truck.

 

The top line is the return from the cooler.

Frank
CPT

 

Cool, thank you.
Now I can put my truck back together.