Changing ATF Toyota Fortuner || Automatic Transmission Fluid ATF
Automatic transmission fluid (ATF), also known as transmission fluid or tranny fluid (colloquial), is the fluid used in vehicles with self-shifting or automatic transmissions. It is typically coloured red or green to distinguish it from motor oil and other fluids in the vehicle.
The fluid is optimized[1] for the special requirements of a transmission, such as valve operation, brake band friction, and the torque converter, as well as gear lubrication.