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What is the function of automatic transmission fluid in cars?

1 Answers

McCody

07/30/25 1:24am

Automatic transmission fluid in cars serves as a lubricant to maintain system cleanliness and prolong the lifespan of transmission components. It offers resistance to low temperatures and ensures effective lubrication even in cold conditions, reducing fluid loss under harsh operating conditions. Depending on the transmission structure, transmission fluids are categorized into automatic transmission fluid (ATF) and manual transmission fluid. Approximately 95% of automatic transmission fluids are red in color. Beyond lubricating and cooling the planetary gear set, their primary role is to transmit power. Under normal driving conditions, automatic transmission fluid should typically be replaced every 120,000 kilometers, while under severe driving conditions, replacement is recommended every 60,000 kilometers.

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