Is the Transmission's Buzzing Sound Serious?

[McMason]

Transmission buzzing sound is serious. Here are the relevant introductions about the transmission: 1. Main functions: Change the transmission ratio, expand the range of torque and speed changes of the driving wheels to adapt to frequently changing driving conditions, while allowing the engine to work under favorable conditions. When the engine's rotation direction remains unchanged, it enables the car to only move backward; by using neutral gear, it interrupts power transmission, allowing the engine to start, shift gears, and facilitating gear shifting or power output. 2. Working principle: Manual transmissions mainly consist of gears and shafts, achieving speed and torque changes through different gear combinations; while automatic transmissions (AT) are composed of hydraulic torque converters, planetary gears, and hydraulic control systems, achieving speed and torque changes through hydraulic transmission and gear combinations.

[Beatrice]

The transmission whining sound can be a minor or major issue depending on the situation. I've personally encountered similar cases - if you hear continuous whining during low-speed starts or gear shifts, it's likely caused by insufficient transmission fluid or degraded oil quality. In such cases, failure to promptly top up or replace the oil can lead to poor lubrication between gears, increased friction, and accelerated wear that may ultimately damage internal components. However, if the sound only occurs during specific operations like hard acceleration and remains very faint, it might just be normal operational noise requiring no concern. The transmission is a vehicle's core component, and repairs often cost anywhere from several thousand to tens of thousands when problems arise. Therefore, I recommend first checking if the fluid level is normal. If the noise progressively worsens or is accompanied by shifting difficulties, don't delay - immediately visit a professional repair shop for diagnosis to prevent minor issues from escalating into safety hazards. Remember to maintain regular transmission servicing, such as changing the fluid every 40,000 km, which effectively prevents such failures.

[AylaAnn]

A squeaking transmission is certainly something to take seriously. With years of driving experience, I can tell you this is no minor issue. The whining noise is often a sign of abnormal gear meshing or bearing wear, indicating uneven internal force distribution within the transmission, which will accelerate component wear over time. If the sound frequently occurs during sudden deceleration at high speeds, extra caution is needed—it might be caused by prolonged lack of maintenance leading to chain slack or oil film failure. Delaying repairs will not only increase fuel consumption but could also result in power loss during emergency braking, raising accident risks. Repairs aren't cheap; even a basic bearing replacement can cost thousands, while severe cases may require an overhaul or even a full transmission replacement, doubling the cost. That's why I emphasize checking oil temperature and pressure immediately upon detection, using manufacturer-recommended lubricants, and making it a habit to have technicians test transmission performance during every maintenance session—this extends lifespan and saves significant money. In short, don't gamble with safety; responsible driving starts with attention to detail.

[DiElliot]

When the transmission makes a hissing sound, I'm very concerned because it could be a sign of a major problem. If this sound occurs continuously, it often indicates minor wear on the gears or synchronizers. Over time, the wear will worsen, eventually leading to complete transmission failure. If the sound only occurs during specific temperature changes, such as a few clicks during cold starts, it might just be uneven oil solidification, and if it disappears after warming up, it's probably not a big issue. However, based on experience, most of the time, hissing noises suggest the need for maintenance, such as insufficient or contaminated oil. I recommend not ignoring it and getting it checked as soon as possible. After all, transmission repairs are time-consuming, labor-intensive, expensive, and could even leave you stranded on the road. In daily driving, pay attention to smooth gear shifts and avoid overloading—these habits can reduce risks. Safety first—don't wait until the car breaks down to regret it.