Has anyone installed a transmission temperature gauge or used a OBD computer to measure the transmission temperature? One of my gripes of the Expedition versus the Suburban is that the Suburban message display will show the transmission temperaure, but the Expedition does not. I have the heavy duty tow package, but I'd really like to know that the transmission isn't running too hot with my 30' #5,500 (loaded) travel trailer running in the AZ heat loaded with my family of 7. I don't understand why Ford didn't program this into the message display since the data is already in the computer already. Personally I think this is a purposely witheld feature that will be added in a later years and promoted after all the new model buzz has faded.