Froggie has two coolers. He has an early99 and they did not come with a fluid to fluid cooler like other years. He runs from the factory trans cooler to a tru-cool trans cooler and back to the transmission.
I upgraded my radiator to one with a fluid to fluid cooler in it. My fluid goes from the cooler in the radiator to my tru-cool trans cooler and then back to the trans. With a load of 10k on my truck I am lucky to see 160* while towing unless I am stuck in traffic and then it will get up to 180*. It will also get as high at 180* while drag racing. Since my rebuild I have never seen over 190* which is awesome.