400 THM Cooler

CP

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#1
Make
Chevy
Model
3/4 ton
Year
84
Miles
Many
Engine
350
Have a 400 Turbo Hydro in a non running (yet) 84 Chevy Pickup. Hooking up the cooler lines to radiator and auxiliary cooler and wondering, coming out of the transmission, which is flow and which is return?
Thanks
 
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#2
Over ten years ago, can't swear by it but think it was the higher of the two that was the output. Was instructed to use the radiator first than the auxiliary cooler mounted in front of the radiator.

But in logical terms does it really make any difference? And what does the radiator do, does it cool or heat the AT fluid?
 
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#4
When you could remove the tanks from a brass radiator that AT coolant line was only about six inches long in the lower tank.
 

bp042665

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#6
the lower line is pressure at radiator and It only matters if you live where it gets below freezing a lot then you want to got into radiator then external cooler