What s wrong with the abnormal sound of the gearbox? What is the cause of the abnormal noise of the

The abnormal noise of the gearbox is mainly caused by loose bearing wear and abnormal meshing between the gears.

Common causes of abnormal noise in automatic transmissions:

1. If the automatic transmission is not repaired in time after water ingress, it will cause a series of automatic transmission failures. Such as: oil leakage, abnormal noise, impact and other faults.

2. If the automatic transmission oil is not replaced for a long time, the automatic transmission oil will become thicker, and the long-term use will make it lose its efficacy, and there is no protective layer between the components and direct friction, which will aggravate the wear and tear of mechanical parts, and damage the automatic transmission planetary carrier, differential and other components in serious cases, resulting in abnormal noise.

3. The use of inferior transmission oil, low-quality or counterfeit transmission oil, poor temperature resistance, easy to oxidize, resulting in sludge and oil residue, blocking the automatic transmission filter screen and lubricating oil channel, resulting in increased friction of the internal components of the automatic transmission, abnormal noise failure.

The abnormal sound of the gearbox is mainly due to the loose wear of the bearing and the abnormal meshing between the gears, which basically occurs in two periods, that is, the sound when the gear is neutral and the sound after the gear.

1. Neutral sound.

Abnormal noise in neutral means that there is an abnormal sound when the transmission is in neutral position, and the sound is eliminated after pressing the clutch pedal.

Causes of failure: 1) When the transmission and engine are installed, the engine crankshaft and the centerline of the first shaft of the transmission are not concentricity.

2) The first shaft bearing is damaged and makes an abnormal noise.

3) The second shaft front bearing, that is, the short cylindrical roller bearing without an outer ring, is seriously worn, dirty, and fluffy. Individual bearings are damaged, and the abnormal noise is aggravated and there is a beating impact sound.

4) Due to frequent overload and overhanging, the biaxial bending is caused.

5) The gears that are often meshed in the maintenance are not matched, and they are not replaced in pairs during the repair, resulting in poor meshing.

2. It sounds after hanging the gear.

Gear ringing refers to the transmission sounding after being put into gear, which is due to the impact of the interconnected gears during operation.

Causes of failure: 1) The synchronizer is damaged, and the surface of the cone hub is damaged.

2) Due to long-term overload, overhanging, and untimely maintenance, the shape accuracy of the transmission shell is out of tolerance, and the quality of repair is not high, resulting in abnormal noise.

3) Improper replacement of gears, and the normal meshing of gears is destroyed after replacing shafts or bearings.

4) The technical condition of the transmission system is poor, such as incomplete clutch separation and unbalanced transmission shaft resonance, so that the transmission gears have a mutual impact effect during the meshing process.

5) Because the purchased gear is not produced by the supporting factory, or is self-processed, the manufacturing process and installation error of the gear is too large, which destroys the normal meshing of the gear and causes the impact during the gear contact.

Abnormal sound of transmission gears is usually caused by low or deterioration of the transmission oil level, too large or too small gear meshing clearance, and poor gear meshing. When diagnosing the cause of abnormal noise fault of transmission, the law of abnormal noise should be distinguished first, and the possible fault cause and solution should be further judged according to the situation.

When the gearbox engagement clearance is too large, the driving gear hits the passive gear when it rotates, and this sound usually gets worse as the transmission temperature increases. If the meshing gap is too small, the abnormal sound emitted is usually continuous, some are more uniform, some are uneven, and the faster the speed, the more serious the noise, and often overheat the lubricating oil of the transmission. The gear sound is sometimes caused by the collision of the gear tooth surface, which is uneven and rhythmic, and the louder the throttle, the louder the sound, and in severe cases, the vibration of the transmission will be felt.

If you hear an abnormal sound in the transmission part of the cab when the car is idling or driving. The possible causes are: lack of transmission oil or deterioration of oil quality; Transmission bearings are worn, loose or damaged; transmission shaft bending; The gear meshing is abnormal, and the meshing gap is too large or too small; Gear tooth surface metal peeling, tooth fracture or repair assembly misalignment; The gear lever and shift fork grooves are loose.

The corresponding treatment measures are: there is a sound of dry metal friction in the car driving, and there is a hot feeling when touching the transmission shell with your hands, which is due to the sound caused by the lack of lubricating oil or deterioration of the lubricating oil, and the oil should be refueled or checked for oil quality, and replaced if necessary.

There is an abnormal sound when neutral, and the sound is eliminated after stepping on the clutch pedal, generally for the front and rear bearings of the transmission shaft to wear, loose or often meshing gears, such as changing into any gear, mostly for the second shaft after the bearing sounds, for seriously loose or damaged bearings, should be repaired or replaced.

If the automatic transmission oil is not changed for a long time, the automatic transmission oil will become thicker, and the long-term use will make it lose its efficacy, and there is no protective layer between the parts and direct friction, which will aggravate the wear and tear of mechanical parts, and damage the automatic transmission planetary carrier, differential and other components in serious cases, resulting in abnormal noise.

2.Cause of failure (1) The transmission is short of oil or the oil quality is deteriorating. (2) The bearing is worn loose or damaged. (3) The gear meshing gap is too small or the gear is worn excessively, and the meshing gap is too large.

You can check the best of the best oil, and the gearbox oil will not be used for at least a year after it has been replaced, provided that there is no oil leakage.

There may be some reasons why the gearbox has an abnormal noise:

1. Wear or damage to the bearing.

When the bearing is worn, its clearance will increase, and the matching accuracy between the parts will decrease; When the bearing is damaged, abnormal sound will be produced because the bearing can not operate normally, and even cause damage to the parts in the gearbox, resulting in the expansion of the fault.

2. Lubricating oil is insufficient or viscosity is too high, resulting in uneven lubrication.

If this is the case, the corresponding lubricating oil (grease) needs to be replaced, otherwise it will aggravate the wear of the gearbox and shorten the service life.

3. Do not change the automatic transmission oil for a long time.

Long-term failure to change the automatic transmission fluid will lead to the automatic transmission fluid becoming thicker, which will lose its effectiveness due to long-term use, resulting in increased friction due to the lack of protective layer between components, which will increase the wear and tear of mechanical parts. In severe cases, it will damage components such as automatic wave planetary carriers and differentials. Damage to internal parts also causes the automatic transmission to make abnormal noises.

Abnormal gear noises are usually caused by low or deteriorating transmission oil levels, too large or too small gear engagement clearance, and poor gear meshing. When diagnosing the cause of abnormal noise of the transmission, it is necessary to first distinguish the regularity of the abnormal noise, and further judge the possible causes and solutions according to the situation.

When the meshing clearance of the transmission is too large, the drive gear will hit the driven gear as it rotates, and this situation usually becomes more severe as the temperature of the transmission increases. When the clearance is too small, the abnormal noise is usually continuous, some are uniform, some are uneven, the faster the speed, the more serious the noise, and the transmission lubricating oil is often overheated. Sometimes, the noise of the gear removal wheel is caused by the impact of the tooth surface of the gear.

This noise is uneven and rhythmic, the higher the throttle, the louder the noise, and in severe cases, the vibration of the gearbox will be felt.

If the car is idling or driving, an unusual noise will be heard in the transmission section of the cab. Possible causes are: insufficient transmission oil or poor oil quality; worn, loose or damaged transmission bearings; bending of the transmission shaft; Abnormal gear meshing, too large or too small meshing gap; Metal spalling of gear tooth surface, tooth fracture or repair assembly dislocation; The shift lever and shift fork grooves are loose.

The corresponding treatment measures are as follows: there is a sound of dry friction of metal rubber when the car is driving, and there is a feeling of heating when touching the gearbox with your hands. This is the noise caused by insufficient lubricating oil or deterioration of lubricating oil.

There is a strange sound in the neutral gear, and the abnormal sound disappears when the clutch pedal is pressed. It is generally caused by the wear and loosening of the front and rear bearings of the first axle of the transmission or the frequent meshing of the gears. If you change any gear, it is most likely caused by the rear bearing of the second shaft.

Bearings that are severely loose or damaged should be repaired or replaced.

Millions of car purchase subsidies.

Abnormal transmission noise is mainly caused by loose bearing wear and abnormal meshing between gears. The causes of abnormal noise in automatic transmissions include:1

Failure to repair an automatic transmission in a timely manner after water ingress can lead to a series of failures, such as oil leakage, abnormal noise, impact and other problems. 2.If you do not change the automatic transmission oil for a long time, the automatic transmission oil will thicken, and long-term use will make it lose its efficacy.

There is no protective layer between the components, which can cause direct friction, further exacerbating the wear and tear of the mechanical parts. If it is strictly forbidden to use it, it will damage the planet carriers, differentials and other parts of the automatic transmission hail pin, and produce abnormal noise. 3.

The use of inferior or counterfeit transmission oil, poor temperature resistance, easy to cause oxidation, oil sludge, oil residue, clog the automatic transmission filter screen and lubricating oil channel, resulting in the increase of friction of the silver parts inside the self-forward and synchronous transmission, resulting in abnormal noise. Transmission squeak and squeak mainly occur in two periods, that is, when the gear is neutral and when the gear is in gear.

1.The abnormal sound of the gearbox is that the bearings are worn loose, and the meshing between the gears often produces noise.

2.Common causes of abnormal sound in automatic transmissions:

3.Failure to repair an automatic transmission in a timely manner after flooding can lead to a series of automatic transmission failures. Such as oil leakage, abnormal noise, impact and other faults.

4.If you change the automatic transmission oil for a long time, the automatic transmission oil will thicken, and it will lose its effectiveness after long-term use. All parts are rubbed directly without a protective layer, which can aggravate the wear and tear of mechanical parts, and sometimes damage the planetary carriers and differentials of automatic transmissions, resulting in abnormal noises.

5.The use of inferior transmission oilInferior or counterfeit transmission oil has poor temperature resistance, which is easy to produce oxidation, oil sludge and oil residue, which can block the filter screen and lubricating oil channel of the automatic transmission, resulting in increased friction of internal parts of the automatic transmission and abnormal noise failure.

6.The abnormal sound of the gearbox is caused by the wear and looseness of the bearings and the frequent meshing between the gears, which is basically born in the period, that is, when the gears are in neutral, they will make a sound after the gear.

The abnormal sound of the gearbox is mainly caused by the loose wear of the bearings and the abnormal meshing between the gears. Common causes of abnormal noise in automatic transmissions:1

Failure to maintain the automatic transmission in time after water ingress will cause a series of automatic transmission failures. Such as oil leakage, abnormal noise, impact and other faults. 2.

If the automatic transmission oil is not replaced for a long time, it will thicken, and what is the reason for the abnormal noise of the transmission.

The abnormal sound of the gearbox is mainly caused by the loose wear of the bearings and the abnormal meshing between the gears.

Common causes of abnormal noise in automatic transmissions:

1.Failure to maintain the automatic transmission in time after water ingress will cause a series of automatic transmission failures. Such as oil leakage, abnormal noise, impact and other faults.

2.If the automatic transmission oil is not changed for a long time, it will thicken and will fail after a long time. There is no protective layer between the parts, and there is direct friction, which will aggravate the wear and tear of the mechanical parts, and in serious cases, it will damage the planetary carriers, differentials and other components of the automatic transmission, resulting in abnormal noise.

3.The use of inferior transmission oil, low-quality or counterfeit transmission oil, poor temperature resistance, easy oxidation, resulting in sludge and oil residue, blocking the filter screen and lubricating oil channel of the automatic transmission, increasing the friction of the internal parts of the automatic transmission, and producing abnormal noise.

The abnormal sound of the gearbox is mainly caused by the loose wear of the bearings and the abnormal meshing between the gears, which basically occurs in two periods, that is, when the gear is in empty gear and when the gear is in gear.

Several causes and solutions to abnormal gearbox noise.

1.The clutch disengagement is incomplete. This phenomenon is often seen on manual transmissions. To put it bluntly, it is to step on the clutch and put it in gear, not to the end. It's also possible that the clutch pedal was released during gearing.

If you do this for a long time, it will not only make abnormal noises and cause wear and tear on the clutch, but also shorten the service life of the gearbox and clutch for a long time.

Solution: Standardize the operation of the gearbox. Be sure to press the clutch all the way down and then gear, gear, and then release the clutch pedal.

2.The gears are damaged or the connecting bolts are broken. If this is the case, the phenomenon is generally that the rear axle (differential housing) makes a "clanging" sound during driving, and the abnormal sound disappears when the backshift is empty.

Solution: Have a professional check to determine what the problem is, and then analyze it on a case-by-case basis.

3.The transmission pad is broken. If the floor pad of the gearbox is broken, it will not only make an abnormal noise, but also vibrate very strongly, which will resonate with the body and make the vibration in the car even greater.

If it is completely broken, it will affect the gear. Once in gear, the transmission shakes and the impact is felt in the car.

Solution: Replace the transmission pad.

What is the cause of the abnormal noise of the gearbox @2019