ATF is a medium for transmitting the torque converter power. Automatic transmission vehicles require no tedious clutch / pedal shift coordination in order to change gears. It is the most complex of all lubricating fluids. Not only does it have to reduce friction to prevent wear like all lubricants, but it also has to allow a certain level of friction so the transmissions internal clutch materials can engage. ATF must be compatible with all transmission components, operate at both low and high temperature extremes, and maintain constant performance for extended periods. It lubricates the gears, bearings and clutch in the planetary gear unit. It provides you the excellent driving experience even in broad range of driving experience. Toyota has a wide range of ATF specially formulated for your Toyota vehicle.