Transmission fluid plays a vital role in automobiles and its main functions include.

Cleaning, transmission fluid is responsible for keeping the shifting system clean, preventing wear between gears by dissolving and flushing out impurities and deposits, thus extending the life of the transmission.

Lubrication, transmission fluid reduces friction and wear between gears to ensure smoother shifting, and provides effective lubrication at low temperatures to minimize oil loss under severe operating conditions.

Heat dissipation, transmission fluid helps to dissipate heat, as the mutual friction between gears generates a lot of heat, which needs to be dissipated by the lubricant.

Rust prevention, transmission oil prevents corrosion and pitting, insulates metal surfaces and prevents direct contact with the metal body, thus protecting the transmission from damage.

Transmits power. Transmission fluid transmits power, not only in the torque converter, but also in many hydraulic machines within the transmission.

In addition, transmission fluids are anti-foaming to increase the efficiency of transmitting power, as air mixed into the fluid can create foam and reduce efficiency. The performance requirements of transmission fluids are more complex than those of engine oils because they not only need to lubricate and dissipate heat, but they also need to perform consistently under a variety of different operating conditions.