I run a small trans. cooler (5 1/2 x 12 )on a warm 340 w/3200 stahl Dynamic converter.
I've been told the trans. should operate at 170 - 190 degrees.
When I shut it down I usually feel my lines....they are never too hot to touch and I usually get on it pretty good when I drive it.
If you have a gauge on your Trans.what temp. does it run?.....maybe I should plumb my cooler in series with the little pipe in the rad to add some heat,even though I only drive it in the warm months.......tx...al