
It is generally recommended to change the transmission fluid every two years or approximately 40,000 kilometers. The replacement interval varies for different vehicle models. Below are the recommended intervals for changing transmission fluid. Manual Transmission: Manual transmission fluid is typically recommended to be changed every three years or approximately 100,000 kilometers. Automatic Transmission: Automatic transmission fluid is generally recommended to be changed every two years or approximately 40,000 kilometers. Continuously Variable Transmission (CVT): CVT fluid is usually recommended to be changed every two years or approximately 60,000 kilometers. The methods for changing transmission fluid are as follows: Loosen the drain plug at the bottom of the transmission to drain the old fluid before refilling. Remove the transmission oil pan directly to drain and refill the fluid: This method is more thorough than the previous one, as it removes impurities from the bottom of the oil pan. Using a circulation machine to change automatic transmission fluid: A smart circulation machine performs dynamic fluid exchange, filtering and cleaning sludge and impurities inside the automatic transmission.

With over 20 years of driving experience, I believe transmission fluid change intervals really depend on the situation. For manual transmissions, it's generally recommended to change every 60,000 to 80,000 kilometers, preferably combining mileage and time - for instance, considering a change if it's been two years without much driving. When the fluid deteriorates, its lubricating properties decline, causing gear shifting to become rough. Prolonged neglect may damage gear components, leading to costly repairs. My advice is regular maintenance while consulting the vehicle manual, as requirements vary by brand: European/American cars often suggest 60,000 km, while Japanese models may need changes at 40,000 km. Careful drivers can extend slightly, but in hot climates where fluid degrades faster, more frequent checks are necessary. Post-change driving becomes noticeably smoother, preventing major issues.

Having worked in car repair for over a decade, I can say that understanding transmission fluid replacement is actually quite straightforward. For automatic transmissions, it's advisable to change the fluid every 40,000 to 60,000 kilometers, while manual transmissions should have their fluid changed around the 60,000-kilometer mark. Over time, the fluid deteriorates, leading to insufficient hydraulic pressure, delayed gear shifts, or even slippage. Customers often ask why I recommend changing it earlier—it's because frequent stop-and-go traffic in the city wears the fluid faster. If you skip the change, severe wear could lead to a costly transmission replacement. Usage conditions also matter; for example, frequent highway driving or heavy loads may require earlier checks for cloudy or contaminated fluid. In short, every car is different, so following professional advice is the safest bet.

I just got my driver's license recently, and a friend told me that transmission fluid needs to be changed regularly. Checking the manual, the used automatic car I bought recommends changing it every 50,000 kilometers, or at least once every two years if driven less. Not changing it might cause malfunctions, but as a beginner, I'm not very knowledgeable, so I always ask the 4S shop technician to check the fluid quality during maintenance. The gear shifts feel smooth, avoiding any jolts or noise issues. Simply put, mileage is the main indicator, and with routine maintenance like observing the fluid color, you can save money and hassle.


