9 signs of car gearbox damage
(Baonghean.vn) - The gearbox is one of the expensive and complex parts of a car. Therefore, early detection of problems and risks of gearbox damage is important, not only helping drivers feel safer but also saving on repair and maintenance costs.
Gearbox damage can be easily detected when the vehicle is operating with the following signs.
1. Difficult to shift gears
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With manual transmission cars, the gearbox is designed extremely simply, however, it is often difficult to shift gears. For example, shifting from "m0" to 1 or shifting between different gears even though the clutch and lever have been released.
This sign indicates that the vehicle's transmission oil is low or dirty, it may also be that the wrong oil is being used, or the clutch pedal has not been adjusted properly.
2. There is a burning smell
A burning smell indicates that the transmission is overheating, causing the transmission fluid to start burning and become inefficient. Transmission fluid not only lubricates the gears, it also acts as a coolant by constantly circulating the heat generated when shifting gears.
Another cause that can lead to a burning smell on a manual transmission vehicle is the improper use of the clutch, causing the clutch plates to have too much friction and begin to produce a burning smell. However, this smell will quickly disappear if the driver adjusts the way he drives.
3. The car is noisy when in "mo"
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An unpleasant noise when idling could mean that the transmission fluid is due for a change, or it could be a sign of more serious mechanical damage. However, most often the noise is caused by worn bearings or gears in the transmission that need to be replaced.
4. The gearbox is noisy and vibrates
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Depending on whether your car has a manual or automatic transmission, transmission failure can manifest itself in different ways. Manual transmissions often make a grating noise when shifting gears, even when the clutch is fully disengaged. This can happen when the clutch is worn out, or when the gears in the transmission are damaged.
On an automatic car, if the car does not shift gears smoothly as usual but vibrates or shifts with difficulty, you need to have the car checked immediately.
5. Slide the number
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If it’s working properly, the transmission will continue to operate in the gear you want, or the computer will automatically shift gears when it reaches a certain rpm to save fuel. However, if the transmission is slipping, it can jump into different gears, or into “neutral” with a manual transmission.
This is a dangerous symptom, as you may lose control of the vehicle when you need to get out of an emergency situation. Therefore, you should take the vehicle to a repair shop so that the gearbox can be quickly repaired.
6. Uncut cone
This is a symptom that often “haunts” manual transmission drivers. Even though the clutch pedal is fully depressed, the clutch is not fully disengaged, and the clutch plates continue to press against the flywheel, causing unpleasant noises when shifting gears.
However, this symptom is easy to fix, without much cost; just readjust the clutch pedal travel, everything works smoothly again.
7. Transmission oil leak
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Transmission fluid leaks are one of the easiest ways to detect a problem with your transmission. On automatic transmission vehicles, transmission fluid plays a vital role in the vehicle’s operation. Therefore, if you find drops of oil under the car, have it checked immediately.
Unlike engine oil, the transmission does not consume oil during operation, so if you notice that the car is low on oil, it is definitely leaking.
8. Lack of sensitivity
Transmissions are designed to shift gears precisely, if they seem to be shifting less efficiently than usual there is a problem. On manual transmissions this can be seen when shifting gears and revving up but the car still feels sluggish. This is usually a sign of worn clutch plates.
Automatic transmissions also have sluggish symptoms, but only when shifting into Park or Drive. Normally, the transmission will quickly shift into these two modes, but if you find it difficult to do so, it is best to have the car checked and repaired.
9. Check engine light is on
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While this light can come on when there is any damage to your vehicle's engine and transmission, it can also tell you that there is a problem with your transmission.
To find out exactly what is causing this light to come on, you can purchase commercially available diagnostic scanners or take your vehicle in for service.
