What is the purpose of changing transmission fluid?

[McAliyah]

The purpose of changing transmission fluid: It can make gear shifting smoother and more seamless, clean and lubricate the gear system, extend the service life of the transmission components, ensure the normal operation of the transmission, and to some extent reduce fuel consumption. New transmission fluid contains fewer metal impurities, reducing transmission wear, thereby extending the overall service life of the transmission and preventing minor malfunctions. The main functions of transmission fluid are lubrication and cooling; the fluid dissipates heat through the transmission housing and transmission radiator. The fluid level in an automatic transmission must not be too high or too low, as this can lead to quality hazards, causing premature transmission failures and abnormal operational issues.