I am in question of the transmission cooler installed in this specific model and year as if it were possible going at highway speeds if it were possible that it could be possible to run too coll at temperatures below zero? It seemed as though the other day, while traveling at highway speeds as though it was searching for another gear, but yet had already shifted to the overdrive . Could this be that the fluid is being running too cool? Is there something else a person should be aware of in this situation? Is it possible that I should cover the cooler in these frigid temperatures?

to me it sounds like you might be a bit low on transmission fluid

auto computer problem