Thanks Francene, but I'm a DIY sort of guy and this looks like something I can do. Besides by doing something oneself one can always find the responsible party when things go awry.
In my search for info I came across the following site which is for a book. Now I'm not saying buy the book just that the site allows the viewer to read some passages from the book. In this case there is a good deal of info on transmission coolers: the differences in types, pros and cons etc. In case the link doesn't take one to the page it starts on page 191 and runs for several pages. Here's the link:
http://books.google.com/books?id=KKPcTD4nx...;q=&f=false
At the moment the JCW site seems to be selling what I'm looking for at a good price especially considering the free shipping offered as a promo.
And since everyone likes photos, here is a photo of our
UHaul which we have named "Happy Camper". 1984 and everything still works and is close on original (although the over stove exhaust fan is a bit noisy).
Bests,
David