What is the method for changing car transmission fluid?

[LeNova]

Car transmission fluid replacement method is: 1. Start the engine for preheating; 2. Remove the drain bolt; 3. After the transmission fluid is drained, reinstall the bolt; 4. Locate the transmission fluid filler port and add new fluid; 5. Start the vehicle and perform gear shifting operations, pausing for 5 seconds in each gear; 6. Check whether the transmission fluid level is normal. The functions of the transmission are: 1. To change the transmission ratio and expand the variation range of driving wheel torque and speed, allowing the engine to operate under favorable conditions; 2. To enable the vehicle to reverse while maintaining the engine's rotation direction; 3. To interrupt power transmission using neutral gear, allowing engine starting and idling, facilitating gear shifting or power output.