What are the effects of excessive manual transmission fluid?
2 Answers
If the transmission fluid is excessive, it is recommended to adjust the fluid level promptly. The impacts of excessive manual transmission fluid are as follows: 1. Increased operational resistance inside the transmission. 2. Abnormal oil leakage may occur. High oil pressure can cause oil seals to leak, and excess fluid may overflow through the vent hole. Precautions for changing manual transmission fluid: 1. Select the appropriate viscosity when changing the fluid. Refer to the vehicle's user manual or maintenance manual for proper refilling. 2. Do not mix different types of oil. When adding oil, adhere to the original manufacturer's standards. If adding oil of a different brand, ensure the previous oil is completely drained to avoid adverse effects on the vehicle due to differing oil properties.
Last time I overfilled the manual transmission fluid in my car, and it almost caused an accident. At first, I noticed the gear shifting felt a bit sticky and not as smooth as before. After driving for a while, there was even a smell of oil inside the car. Later, a friend at the repair shop told me that too much fluid increases pressure, which can easily damage the seals, leading to leaks or even internal transmission damage. Even worse, elevated fluid temperature can cause foaming, reducing lubrication effectiveness. Driving like this long-term can cause severe wear, and replacing the entire transmission isn’t cheap. It’s recommended to carefully measure the fluid level with a dipstick during each oil change, following the manual’s specifications—if there’s too much, drain some out. Also, pay attention to whether gear shifts feel smooth during normal driving and address any issues promptly.
