What is the function of automatic transmission fluid?

1 Answers
VanAsher
07/29/25 9:51pm
Maintains the cleanliness of the gear system and serves to lubricate, extending the lifespan of the transmission components. Below is an introduction to automatic transmission fluid: 1. Automatic transmission fluid is specifically designed for automatic transmissions. In the early days, automatic transmissions did not have dedicated fluid and instead used engine oil. Due to significant differences in working conditions and technical requirements, the practice of using engine oil as automatic transmission fluid was quickly phased out. Today's dedicated automatic transmission fluid serves both as the hydraulic fluid for the torque converter and as the lubricant for the planetary gear structure and the hydraulic fluid for the shifting mechanism. 2. Under normal driving conditions, automatic transmission fluid should generally be replaced every 120,000 kilometers, while under severe driving conditions, it should be replaced every 60,000 kilometers. It is advisable to use the original manufacturer's ATF. Do not misuse or mix different types of automatic transmission fluid. Always use the ATF model specified in the vehicle's maintenance manual. Different ATF models have different friction coefficients.
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