Interesting articles. However, unless I missed something, seems they still refer to miles & not time. If TF gets too hot, should change it earlier mileage vs. if it does not get too hot. Nothing about time with low miles.The life expectancy of an automatic transmission is largely dependent on the transmission fluid operating temperature. If the temperature is maintained around 175°F, the fluid should be good for around 100,000 miles. For every 20°F above that target, the oxidation rate doubles and the fluid life is cut in half. Since the transmission fluid temperature isn't rigorously monitored, and the cost of a transmission failure is very high, it makes sense to simply change the fluid at an earlier interval.