A specific type of automatic transmission fluid (ATF) often used in power steering systems, particularly in vehicles manufactured by a prominent Japanese automaker. It functions as a hydraulic fluid, transmitting power within the steering system to assist the driver in turning the wheels. While some vehicles require specialized power steering fluids, compatibility charts often list the aforementioned ATF as an acceptable alternative for particular Toyota models.
The use of this type of fluid offers benefits such as widespread availability and potential cost savings compared to dedicated power steering fluids. Its function provides necessary lubrication and pressure for system parts to operate effectively, which helps to ensure smooth steering performance and prolong the lifespan of the power steering pump and related components. Its past adoption as a suitable alternative stems from its comparable viscosity and hydraulic properties compared to the original specification.