Auto Transmission fluid

How about do this? Maybe some other members will agree with me and not give there personal long stories.
Change the antifreeze every three YEARS and forget the mileage.

Change the transmission fluid about every five years. Your are not driving it that much. Remember that if the converter does not have a drain plug that you are leaving about 3 quarts of old fluid in there. Also pull the transmission pan any time the fluid turns to a brown color. If it does turn brownish just plan on pulling the transmission.