I noticed that on charts for transmission fluid temperature they say that fluid temps over 200F reduces its life expectancy. http://www.tciauto.com/Products/TechInfo/trans_life_expectancy.asp http://www.digi-panel.com/digidevicesweb/trannyoil.htm My radiator gets up 212F. According to these charts, my fluid won't last more than 50,000 miles. Most vehicle today have their ATF cooled by the radiator, and most cars have thermostats over 200F. This does not sound right. The fluid must last longer.