What happens when the vehicle is in gear?

The gearbox is also called "transmission", commonly known as: "brake box, pressure box, tooth box, gearbox, dial box, tail tooth" and other names;

Abnormal noise when gearing is also often called: abnormal sound of the gearbox, abnormal sound of the gearbox, abnormal sound of gear shifting, etc.

Abnormal noise when the vehicle is in gear, the main causes and solutions:

1. If the lubricating oil deteriorates or is missing, the lubricating oil should be replaced or replenished;

2. The clutch is not completely separated, resulting in abnormal noise in the gear;

3. The gears and synchronizers in the gearbox are seriously worn, resulting in excessive clearance, and the gears and synchronizers are replaced and damaged;

4. If the gap between the bearing and the spline on the shaft is too large, replace the new bearing and thrust washer;

5. The shaft is bent and deformed, and the bearing is loose and causes abnormal noise, and the shaft and bearing are replaced;

6. The shift fork shaft is seriously worn, and the shift fork shaft or fork should be replaced.

The reasons for the noise in the gear are improper operation, clutch failure, sprocket wear, and chain looseness.

On the issue of abnormal noise of automobiles, it is difficult for ordinary car owners to distinguish which ones are abnormal noises and which ones are reasonable abnormal noises. Only nearly 20% of the vehicles that went to the repair shop to detect abnormal noises really had problems. In the case of a turbocharged engine, there is a must be a difference between the sound and the sound of a naturally aspirated engine; Models with engine guards may also make noises due to friction; After some car owners come into contact with different cars, it is likely that they lack their own understanding of mechanical knowledge, so they can distinguish the abnormal noise of the car and avoid wasting time and energy.

Second, the identification method of car noise:

In practice, due to the limitations of working conditions, it is difficult to measure the sound of the car with special instruments, and the sound of the car can only be described and compared with the judgment of the sound in daily life. For example, the "rattle" sound caused by the dry friction of the bearing, and the "click" sound similar to the small hammer hitting the cement floor caused by the excessive valve clearance.

1. Correctly distinguish between normal and abnormal sounds.

The vibration of each mechanism in the work of the car will emit a variety of sounds, but the sound does not mean that the car is faulty, in order to seep into Chang to avoid unnecessary disassembly, first of all, we must distinguish between normal sound and abnormal sound. The normal vibration sound of each cluster system component (such as the noise on the engine surface), the impact sound of the gear when shifting, the air intake sound and exhaust sound of using gas as the working source, and the gear meshing noise are all normal sounds. Abnormal noise (abnormal noise) can be divided into slight noise, general noise and malignant noise according to the impact on the performance of the car.

Slight noise, such as the flashover sound of high-voltage electric leakage, the slight loose sound of rolling bearings, etc., the general volume is small, the degree of damage to the grinding belt of the machine is not large, and there is no significant change for a long time, and this kind of fault can still maintain the normal driving of the car without repair.

3. When diagnosing abnormal noise, attention should be paid to creating good auscultation conditions and trying to eliminate the interference of other noises, so as not to affect the accuracy of judgment.

It is best to consciously amplify or reduce the sound, that is, use a screw or other metal rod as a stestological instrument to contact the sound part to amplify the sound, or use a single cylinder fire cut-off to reduce the sound to meet the diagnostic needs. The auscultation site should be kept quiet to minimize human interference.

In the case you said, it won't sound with a little throttle, right? If so, most of them are clutch gaps and replace the clutch plates. Another possibility is a lack of transmission fluid. You're new and it's best to go 4s to check it out.

There are many reasons why the car gear has abnormal noise:

1. It may be that the clutch is not completely separated, and the clutch is not stepped on to the end.

2. It may also be that the transmission linkage mechanism is loose.

3. It may be that the clutch plate is seriously worn and the pressure plate is damaged.

4. When the gear is in gear, the gear is rubbed, and the individual gear surface is broken, resulting in the impact during the meshing process.

5. The gear is not in place and other reasons cause abnormal noise of the gear.

The solution to the abnormal noise of the car gear:

1. Be sure to put the clutch in place;

2. Check the linkage mechanism and tighten it;

3. Replace the damaged clutch plate;

4. The clutch is not clear, check the clutch.

5. The gear lever is loose (the connecting rubber sleeve is loose), and the gear lever is tightened.

There may be several failure points for analyzing the causes: 1Clutch pedal shaft:

The lack of oil in the nylon sleeve will produce abnormal noise; 2.Clutch release lever: The lever fulcrum is a spherical bulge, and the overload of the clutch will cause the grease to dry up early and cause abnormal noise; 3.

Clutch release bearing and sliding sleeve: Dry grease from bearings and sliding sleeves will cause abnormal noise in the clutch pedal.

There are many reasons for noise when the car is in gear, and it can be that the clutch is not fully disengaged. There are three reasons for the noise when the car is in gear: first, it is not stepped on to the end; second, the linkage is loose; Third, the clutch plate is seriously worn and the pressure plate is damaged.

The sound of the car gear is due to the friction of the gear when the gear is engaged. If there is no synchronizer in the reverse gear, this problem is prone to occur. Generally, no repairs are required.

When you are in gear, you will hear abnormal noises. A slight noise is normal, but a lot of noise is not normal.

The cause of the abnormal noise when the car is in gear.

1) The transmission housing is damaged, and the transmission housing and bearing housing hole are worn and deformed for a long time. This training noise is maximum in low gear and gradually decreases with high gear, while direct gear is minimum.

2) Impact during meshing due to individual tooth surface fragmentation. Strong shocks and vibrations are generated when the gears are meshed, causing resonance in the transmission housing.

3) Improper assembly of the transmission, improper replacement of gears or needle roller bearings and bushings in a certain gear of the transmission, and abnormal clearance of loading and transportation, resulting in abnormal sound caused by poor gear meshing when the gear is transmitted.

The reason why the 2nd gear car makes a sound:

1.The clutch didn't step on the bottom;

2.Loosening of linkage mechanism;

3.The clutch plate is seriously worn, and the pressure plate is damaged;

4.The gears are not in place.

Is there any noise when changing gears? What to pay attention to when operating:

1.The car should come to a complete stop, 2In case of abnormal noise, first return to neutral, release the clutch, then step on it, and then hang the reverse gear. Generally, there will be no noise from the old judgment. If it still appears, repeat the above operation.

3.Once there is a shift noise, do not force the gear to change, otherwise the maintenance cost will be very expensive after the gear breaks.

Solutions to noise and squeak when the car is in gear:

1.The clutch must be pressed;

2.Check the linkage mechanism and tighten it;

3.Replace damaged clutch plates;

4. Master the correct way to hang the gear, and the hanging gear must be in place.

5. The clutch is not clear, check the clutch.

6.The gear lever is loose (the connecting rubber sleeve is loose), so tighten the gear lever.

7.Failure of the internal of the gearbox (synchronizer failure), etc. It will cause abnormal noise in gear shifting. Sometimes squeaks are normal. For example, the abnormal noise caused by stepping on the clutch completely or changing gears without stopping is normal.

To sum up, there is an abnormal sound when the car is in gear, and it is necessary to judge from the sound that the abnormal sound comes from. If the sound is low when shifting gears, the shift mechanism will make a sound near the shift lever. If there is a clicking sound when the gear is engaged, it is caused by the shock failure of the gears of the transmission.

The reason for the abnormal sound of the P gear may be the sound of the gear biting, stop the car steadily, first push the N gear car to a complete standstill, and then pull the handbrake to hang the P gear, the steps are like this, pull the handbrake, hang the N gear, release the brake, and then step on the brake, hang the P gear.

The reason for the abnormal sound of the P gear may be the sound of the gear biting, stop the car and push the N gear car completely stationary and then pull the handbrake to hang the P gear, the steps are to step on the brakes like this, pull the handbrake, hang the N gear, release the brake, and then step on the brakes, and hang the P gear.

The reason why there is an abnormal sound in the P gear:

1. According to the structure of the automatic gear, this sound is also normal, the P gear is designed as a parking gear, the principle is a brake claw, stuck ring gear, as long as the ring gear has a gear, it is perpetual, a fixed, a perpetual motion, a dozen of course produce abnormal sound, the structure of this P gear lock car is caused by the mutual cooperation of the gear and the locking pin work on the internal output shaft of the transmission, so there is a function that can not move before and after the vehicle can not be hung into the P gear, and the greater the slope, the more the force is appropriately increased.

2. For this case, you can first stop the car and pull the manual brake (handbrake) and then hang into the P gear, the effect will be better. Secondly, in this case, it is recommended to test the performance of the engine pawl, if the performance is reduced, the above phenomenon will be caused.

Photo by Pacific Automobile Network Q&A).

First, the phenomenon of loud sounds. The sound of the transmission after the gear is geared is caused by the impact of the meshing gears and the resonance effect of the transmission housing cavity during operation. 2. Cause of sound (1) The transmission housing is damaged, and the transmission housing and bearing seat bore are worn and deformed for a long time.

The sound of this training is the largest when it is engaged in the low speed gear, and the sound decreases gradually as it is engaged in the high speed gear, and the direct gear is the smallest. (2) Due to the fragmentation of individual gear surfaces, the impact during the meshing process is caused. When this gear is engaged, there is a strong shock and vibration that resonates with the transmission housing.

3) The transmission is not properly assembled, the gears or needle rollers of a certain gear of the transmission are not properly replaced, and the assembly clearance is abnormal, resulting in poor gear meshing and abnormal noise during transmission. (4) The transmission system (clutch, transmission shaft) outside the transmission is in poor technical condition, resulting in impact and vibration during use, which causes the transmission to resonate and resonate noise. This noise tends to be irregular and occurs sporadically in a certain speed region.

5) The noise caused by other factors in the transmission, such as the logarithm of the working gear, the rotation speed, the working specification, the load, the noise caused by the lubricating oil is too little and many other factors, some noise can be eliminated by not dismantling the inspection, some can not be excluded, can only be disassembled and overhauled, and only after the technical requirements of each part are met, can be completely eliminated, especially for the gear replacement should be replaced in pairs as much as possible to ensure that the gear has a good meshing. When installing other parts, pay close attention to the clearance of each part to make it comply with the regulations.

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The reasons for the abnormal sound of the gear are: 1. The driver operates improperly and uses too much force; 2. The gear is broken or broken; 3. Failure of the mechanism in the gearbox; 4. The internal bearing is damaged by the base liter. The solution to the abnormal noise in the gear is:

1. Pay attention to driving habits and avoid operating the gear lever too violently; 2. Check whether the gear is broken or broken; 3. Check whether the mechanism in the gearbox is faulty; 4. Check whether the internal bearing is damaged. The precautions for gear gear are: 1. Don't lower your head to gear and pay attention to driving safety; 2. Hold the direction when gearing, hold the steering wheel tightly with one hand, and gear with the other; 3. Don't shake the gear lever back and forth; 4. The gear and speed should match.