Vehicle Specific Transmission Fluids Asian Vehicles APPLICATION GUIDE
Idemitsu Technology

The Case For Vehicle-Specific ATF

There are critical areas in new transmission designs that have unique lubrication needs and require specific lubricant characteristics. Generally, the more gears incorporated in a transmission, the more efficient it becomes.
To accommodate the increasing number of gear sets, the clutch packs have become smaller and the total surface area of the clutch plates have been reduced. ATFs must provide a precise balance of frictional properties that provide the exact coefficient of friction specific to the OEM design that allows proper clutch heat transfer and wear protection.
In addition, the increased use of the torque converter lockup clutch requires controlled friction properties that enable the hardware to deliver significant efficiency improvements. When ATF friction properties are not compatible with the torque converter lockup clutch material, the transmission produces
shudder (vibration), and drivability is negatively impacted.
These two friction requirements require a delicate balance of friction modifier additive chemistry stabilized by a robust combination of antioxidants and specifically engineered lubricant fluid (or base oil) technology in order to deliver the performance required for smooth and consistent vehicle launches and shifting throughout the entire life of the oil.
Working with individual OEMs, Idemitsu has engineered technologies to meet these precise property requirements.