How often should the CVT transmission fluid in a Corolla be changed?

[SanLane]

The Corolla CVT uses maintenance-free transmission fluid, which generally does not require replacement unless major issues arise. Whether to change the transmission fluid depends on the operating condition of the vehicle's transmission. Typically, it's recommended to inspect for abnormalities every 40,000 kilometers. The Corolla CVT transmission employs pure computer-controlled shifting, eliminating the need for complex gear combinations, thereby improving fuel economy and power performance. Methods for changing transmission fluid: Gravity Drain: Using tools to loosen the drain plug, the transmission fluid flows out under gravity. While simple, this method doesn't fully replace all fluid, as residual fluid may remain in recesses and dead corners. Flush Machine Replacement: New transmission fluid is stored in the flush machine, which connects to the transmission's fluid circuits. Under hydraulic pressure, new fluid pushes out the old, resulting in a cleaner system. The more new fluid used, the cleaner the flush. A typical flush requires about 10-13 liters of transmission fluid and takes approximately one hour. Precautions for using transmission fluid: Regularly check the transmission fluid level to ensure it remains within the specified range. Top up as needed based on actual operating conditions, ensuring the added fluid is of the same type. When replacing fluid, do so while the transmission is operating to promptly drain the old fluid and clean the system. Regularly inspect the shaft end seals and external joints for leaks or seepage, and replace failed seals and gaskets promptly.