I am going to do the "multiple drain and fill method" to change the automatic transmission fluid (ATF) on a 2009 Toyota Rav4 (2.5L four cylinder engine/four speed transmission) with 110,000 miles on it. As far as I know, the ATF has never been changed on this vehicle. The fluid looks a little dark, but does not smell burnt. The plan is to drain and fill the transmission three times. The first two times, drain the ATF through the transmission drain plug, the third time drain the fluid, and also remove the pan and change the automatic transmission filter. When changing the transmission fluid with this method, how many miles does one put on the car between the drain and fills? Is there a number of miles you should not exceed between the drain and fills?