What is worng:
Well, it doesn't hold the water because about one third of the fins is rusted and fell out. I think, that happened, cause the water stood in the crossbeam under the radiator for a long time. Everywhere on the remaining fins you see leaked and crystallised cooling-fluid.
the problem hasn't been solved till today
Its not easy to get a TransSport Radiator, because they mostly have a 3.2 or 2.5 litre Engine over here. To get a 3.8 V6 with an Automatic Tranny is not so easy.