there is a difference between a standard model and an automatic the fluid from the tranny cools in the bottom of the radiator in an automatic but usually it does not over heat the engine. check the thermostat. makes sure the fan clutch is working then have the radiator blown out with hi pressure air. then if none of those fix it check the water pump. if it is leaking it is shot and needs to be replaced.
Duey
January 2012