Hi Gilly
It approaches the red.
Right now the aux. fan is wired to the ac compressor.
It will always run with the compressor but never without it.
I will change that and see what happens.
The radiators are clean (at least on the outside ).
If I drive the car on the open road without grades the temp is fine.
Maybe the engine/cooling system is not designed to handle the heavier
SEL body.