How many liters of oil are needed for a gravity change of Aisin 6AT?
2 Answers
Aisin 6AT gravity oil change requires 4 liters. Compression Ignition: Corresponding to an ignition method for diesel engines, diesel engines use diesel as fuel. Compared to gasoline, diesel has a lower auto-ignition temperature (around 220 degrees Celsius), higher viscosity, and is less prone to evaporation. Additionally, diesel engines do not have spark plugs, and their compression ratio is higher than that of gasoline engines. Therefore, diesel engines rely on the compression stroke to compress the air-fuel mixture to the ignition point, causing it to ignite automatically, hence this ignition method is called compression ignition. Spark Ignition: Corresponding to an ignition method for gasoline engines, gasoline has a higher auto-ignition temperature (around 480 degrees Celsius) compared to diesel, and its lower viscosity makes it easier to evaporate. As a result, it can form a uniform mixture with air outside the cylinder.
Last time I changed the Aisin 6AT transmission fluid for my friend's Corolla using the gravity method, which required about 6 liters. The fluid shouldn't be drained too quickly—the car needs to be parked level, and the oil pan bolt should be loosened to let the old fluid flow out naturally. After fully draining, add new fluid. During the first fluid change, I lacked experience and only added a little over 5 liters. After driving, the shifting felt a bit rough. Later, I checked the manual and found that 6 liters were required. I went back to the shop to top it off, and then it worked properly. The transmission is quite precisely designed—the fluid cavity capacity is fixed, and insufficient fluid can affect hydraulic pressure. I recommend using the manufacturer-specified fluid and avoiding mixing brands, as it can easily cause clutch plate wear. Replacing it every 40,000 km or two years is the safest approach to prolong the transmission's lifespan. You can also check the dipstick yourself—if the fluid looks black or smells burnt, it's time for a change.
