How many kilometers should a sedan's transmission fluid be replaced?

2 Answers
McAlexis
07/28/25 3:02pm
Different types of transmissions in cars require different intervals for changing the transmission fluid. The specific replacement intervals are as follows: 1. Automatic transmission fluid: Generally, automatic transmission fluid needs to be replaced every 40,000 to 60,000 kilometers. 2. Manual transmission fluid: The service life is relatively longer because manual transmissions have a simpler structure and mature technology, allowing for replacement every 60,000 to 80,000 kilometers. Information about transmission fluid is as follows: 1. Transmission fluid: It is an oil product used to keep the gear system clean, ensuring the normal operation of the transmission and extending the lifespan of the transmission components. 2. Classification: (1) Automatic transmission fluid: Abbreviated as ATF (Automatic-Transmission-Fluid), it is specifically designed for automatic transmissions. (2) Manual transmission fluid: Commonly referred to as gear oil. Based on its quality level, the American Petroleum Institute categorizes automotive gear oil into five grades (GL-1 to GL-5). GL-1 to GL-3 have lower performance requirements and are used for lubricating spur and bevel gears under general loads, as well as gears in transmissions and steering mechanisms.
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MariaLynn
08/11/25 10:45pm
Having driven sedans for so many years, I've gained quite some experience with transmission fluid changes. Generally speaking, automatic transmission fluid should be replaced every 60,000 to 100,000 kilometers; manual transmission fluid requires more frequent changes, typically every 40,000 to 80,000 kilometers. But this isn't a one-size-fits-all rule—it depends on the car model and driving habits. Take my Honda for example: the manual recommends changing at 70,000 kilometers, but once I delayed it until 80,000, and the car started shifting roughly. I ended up spending thousands to repair the transmission—what a heartache! So now, I get it checked every 60,000 kilometers. Especially if you frequently drive in city traffic or take many short trips, the fluid degrades faster. Regular changes prevent wear and extend transmission life—don’t skimp on this expense.
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