The only ones who recommend you get a transmission fluid FLUSH are the people who make the transmission flush machines and the shops who buy them. As has been stated many times and in many places no automotive manufacturer recommends a transmission fluid as a regular service. In fact General Motors, Chrysler, Ford and most of the import manufacturers recommend AGAINST it, going as far as voiding the new car warranty if it is done.All that is recommended is a regular automatic transmission service which entails dropping the transmission pan, replacing the transmission filter where applicable, draining the torque converter where applicable and refilling with fresh, new automatic transmission fluid.A simple service like this usually runs from $59.95 to $159.95, depending on the year, make and model of vehicle. On most vehicles it is a very easy Do It Yourself job which can save you over half the cost of having a shop do it.