Cwolfe, The tranny is able to compensate for cold fluid operation with its programming, In extreme cold temps (~-50f) it will actually inhibit shift till fluid temp comes up.. I noticed you were from Alaska and now I see your concerns. The only other thing that might concern me is if you stick it to your pan and its not removeable, internal service would be interesting, as the pan would be 'tethered' to the truck with the cord.
Eric