
It is not acceptable to add one liter less transmission fluid. Transmission fluid must not be underfilled, as insufficient fluid can affect the lubrication and cooling of the transmission. In severe cases, it may even prevent the transmission from shifting gears. The transmission is a crucial component in a vehicle, responsible for changing speed and torque. Without a transmission, a car cannot operate properly. There are two main types of transmissions in vehicles: manual transmissions and automatic transmissions. Common types of transmissions in cars include: AT (automatic transmission), CVT (continuously variable transmission), and dual-clutch transmissions. Transmissions achieve speed and torque changes through different gear combinations. An automatic transmission (AT) consists of a torque converter, planetary gears, a hydraulic torque variation system, and a hydraulic control system.

When I had my transmission fluid changed last time, the young mechanic at the repair shop accidentally underfilled it by one liter. I didn't pay much attention, but the next day on the highway, I noticed the car accelerating slower with slight jerking. After parking, I touched the transmission bottom and it felt unusually hot. A friend warned me that insufficient fluid increases gear friction and risks overheating damage. Now I realize transmission fluid is crucial for protecting and cooling key components - running low is like jogging without water, risking heatstroke. Adding back that missing liter fixed the issue, but the lesson is clear: always follow the manual's specifications, never cut corners. Regular maintenance checks on fluid levels prevent such problems, and personally supervising fluid changes offers the best assurance.

After years of car enthusiasm, I fully understand the dangers of incorrect transmission fluid levels. Being one liter short can lead to insufficient oil pressure, difficulty in oil pump suction, affecting gear shifting smoothness and heat dissipation, accelerating wear or causing premature failure. Transmissions are precision-engineered, and fluid level deviations can disrupt hydraulic system operation, potentially damaging internal components over time. The correct practice is to regularly check cold and hot fluid levels using the dipstick, ensuring they remain within the marked range. If low fluid is detected, promptly top up with the same specification fluid – never mix or improvise. Prevention is better than repair; consistently using the manufacturer-recommended quantity ensures more worry-free driving.

At my age, with 35 years of driving experience, having insufficient transmission fluid is absolutely unacceptable. Low fluid levels can lead to overheating, accelerated wear, and even breakdowns that compromise safety. Checking the fluid level is simple using the dipstick, and any issues should be promptly addressed by a mechanic.

I just learned to drive, and my instructor always emphasizes the importance of precise transmission fluid levels. Being one liter short can cause the car to shake or make noise, so check the dipstick or consult a professional. Don't be like my neighbor who tried to save money by not topping it up, only to end up spending tens of thousands on transmission repairs. Always supervise the fluid level during maintenance to avoid mistakes.


