Does Automatic Transmission Fluid Need to Be Replaced?
2 Answers
Automatic transmission fluid needs to be replaced every 2 to 3 years or after driving 60,000 kilometers. The types of transmission fluid include dexron, dexronⅡ, dexronⅢ, and ATFF. The function of transmission fluid is to keep the gear shift system clean, provide lubrication, ensure the normal operation of the transmission, and extend the lifespan of the transmission components. The role of the transmission: to change the transmission ratio, expand the range of torque and speed changes of the driving wheels, adapt to frequently changing driving conditions, and allow the engine to operate under favorable conditions. The hazards of not replacing the transmission fluid for a long time: 1. It can cause damage to the transmission's shift control mechanism; 2. It can lead to abnormal wear of gears and clutch plates inside the transmission; 3. It can affect the normal operation of the transmission, resulting in damage to the transmission's valve body.
Automatic transmission fluid absolutely needs to be changed regularly—don’t overlook this, as it plays a critical role in lubrication, cooling, and power transfer. Just like engine oil, over time and mileage, the fluid degrades, gets dirty, or develops deposits, affecting shift smoothness and, in severe cases, causing gear wear or even total transmission failure. Most vehicle manuals recommend changing it every 40,000 to 60,000 miles, depending on the model and driving habits—for example, frequent towing or city driving in heavy traffic requires more frequent changes. I’ve seen many owners delay too long out of neglect, only to end up paying hefty repair bills. Developing a habit of regular fluid changes keeps your car running reliably for the long haul, saving you hassle and money.
