Trans cooling issues?

Me againg with trans issues. Now I have an external cooler (the radiator cooler blocked) and now the supply line from trans to cooler stays hot and the return line is cool (the trans temp gauge does not move). That is understandable that in the cold weather that the fluid would be cooled, but the trans pan gets so hot that you cant keep your hand on it. Is this normal for the aw4? thanks seth

I'd disconnect the lines at the tranny and blow through them, just to make sure they aren't plugged (again). If your tranny shed enough stuff to plug up the stock cooler it may have plugged something else up also.
If you added non stock fittings to the tranny you have to be careful how far you tighten them into the tranny, they can go in too far and block off most of the flow.
Maybe pull off the stock screw in fittings at the tranny and have a look see and drop the pan for a look see. It's best to have an "O" ring kit handy.
I've seen plugged tranny coolers before, they are often accompanied with a half a handful of crap in the tranny pan. If the transmission shed enough to plug up the cooler, it likely shed enough to cause plugs in other places.
If you use compressed air to try and blow the stoppage out, keep the pressure reasonable or it may cause damage.

Most everytime I pull both cooler lines at the transmission, I blow some air through the line, cooler, line loop.
The opening in the screw in fittings at the tranny is pretty small, a likely place for a stoppage.
I really can't remember if the screw in fitting has a flat seal or an "O" ring (fairly sure it's an "O" ring).