In's and Out's of Cooler Lines
 

I'm sure it's been asked before. I tried to pull the answer with a search, but couldn't see what I was looking for.

which line is the "in" and which line is "out" for the AT and the oil cooler lines ?

This may help...

https://ls1tech.com/forums/automatic...0e-f-body.html

Thanks, exactly what I needed for the AT
I am guessing the rear line on the engine oil cooler system, is the pressurized feed line output for the engine oil cooler.

The front is the out, the rear is the return. I'm not sure why it matters though.