Huming automatic transmission at speed: the main causes. Gul in the gearbox: Causes and Possible Consequences Strong noise in the gearbox

The fact that any gearbox is one of the most key parts in the car, I think no one will argue. Therefore, all the problems that sooner or later occur with the checkpoint should be eliminated on time. After all, this is a fairly serious mechanism, the repair of which in certain situations can be very expensive and comparable even with the repair of the engine.

Mechanical transmission in the context

During operation, the box can demonstrate various troubles that are distinguished not only by characteristic sound accompaniment. But, at today's example, we take the buzz as a basis, what kind of problems can testify and what are the consequences to wait for the owner of the car?

What is interesting, howl can be completely different, differ from the intensity of motion, the speed, the transfer included, and the like, but the signs of him usually reduce the list of problems.

By the way, it may not always testify that problems arose with the PPC. It is really true that this constructive feature The specific mechanism or the device just from repair, that is, the details have not been launched yet. In addition, the reason for the appearance of noise can not serve not only the gearbox itself, but also associated aggregates, for example, adhesion, if it comes to "mechanics". The spring is breaking, worn out released Bearing etc.

Gul on "Mechanics"

A mechanical box is of great distribution, structurally having a not strongly complex system, but the reasons why noise can be coming enough.

What is the manual transmission

For example, the position of the box on a neutral, with a squeezed clutch hears how howl, the cause of this in most cases becomes a wipe bearing of the primary shaft or the bearing of the drive gear. The same thing when the clutch is released and the noise is coming, it's all about the primary shaft bearing.

In the photo: Bearing residues in the primary shaft. Photo - DRIVE2.RU

In general, the reasons for causing foreign sounds can be many, even among mechanics:

Depreciation of the main elements of the main pair (shaft, gear).

in the photo: GAZ GAZ 21 gear

Bearing wear shafts, gear. In this mode, they can work out even a few months, but after such a neglect will turn into expensive repairs.

Problems with separate gears (the teeth were worn out or outdated), for example, if the howl comes only when a certain transmission is turned on.

Oil starvation. Few notes attention to the oil level in the box, and this is an important indicator. If the oil falls below the mark, the sound will be coming on certain transmissions.

Check oil in MCPP HYUNDAI I30

Often, from insufficient number lubricant He suffers from the fifth gear, which is above all.

Too thick oil. FROM high degree Viscosity, butter creates, as if a protective film on the details, which is why the lubrication access in certain parts is hampered. By the way, one of the signs that too thick oil is used, serves the presence of a buzz on the "cold", after heating, which disappears.

Poor quality oil requires replacement. Operated oil, possibly with an admixture of metal particles and water.

Chips on the magnet drain plug KPP

Wire of synchronizers or blocking rings on the shaft.

In the photo: Blocking ring of the synchronizer

Problems with "fork" PPC. At the same time, it may not rarely "" transmission.

By the way, if noise is coming during gear shift, you should pay attention primarily on the clutch, possibly problems with. Exactly, the problems with the release will indicate that when survived, that is, when you press on, the rustle comes. But, if on the contrary, when you let go of the pedal and noise is heard, then almost certainly, problems with the box itself.

Also, the vibrant will also indicate the fact that the transmissions are turned on not exactly or with a noticeable noise, a crunch, it is especially manifested in the first and second gear.

In addition, the reason may hide in synchronizers. Check out the wear of the synchronizer components, blocking the rings, and also measure the gap between the gear and the blocking ring. In different models of the box, the data may differ, read the manual.

Grumble automatic transmission, robot or variator

The constructive part of such boxes is much more technological, therefore attention to problems with them is paid much more. To identify a malfunction is often difficult without disassembling the node completely, it will not really be able to identify problems even specialists with computer diagnostics. It is necessary, as a rule, a complete or partial discoulding node, with the diagnosis of "live". The mind of what, many motorists are trying not to pay attention to howl, that in the end still pours out in expensive repairs. Here is just a small part of the reasons why the hum of the PPC data may occur:

Similarly, the main pair of shaft was worn.

Poor fastening of the semi-axle, which can even appear even a small backlash.

Excessive friction of parts, in particular gear due to offset when installing or after repair.

The shaft bearings have failed, gear.

Worn gears, erased teeth, production on the shaft, all of this leads to the appearance of various sounds.

The level of fluid, its quality does not correspond to the regulated standards of the manufacturer.

In the photo: automatic transmission without pallet, dismantling oil filter

What to do if a rumble appeared?

In any case, from the listed reasons it can be seen that problems can be quite serious and will lead to expensive repair, so you should not neglect such a "signal". You will need help from a specialist, from this not to leave, because a person is not familiar with the mechanism difficult to determine the problem independently with one hundred percent accuracy.

I would like to give some important advice during the diagnosis of the checkpoint:

1. Find out that it was the reason for the appearance of the exercise, if this is the shaft of the main pair, then have the form that he has already had its influence on other details of the mechanism. Therefore, it is likely that the replacement is only not to do.

2. Think about the feasibility of repair, perhaps the cost of buying new or used parts will be large. Then it's easier to find a contract checkpoint or used, but in good condition than to repair the "dead man".

3. Stopped repair, buy only high-quality and original detailsThis will extend the life of your car.

Conclusion

As a result, I would like to emphasize the main thing, should not be neglected with all sorts of signals that can come from the checkpoint, in the form of warning, knocks or special labeling on the "tidy". Ultimately, the repair may be much more expensive.

In addition, trust the diagnosis, and accordingly, the analysis of the box only certified or verified services, avoid the so-called "garage" masters, from which you can get only a new "portion" of problems.

- reliability, efficiency, simplicity of design. You can add a list of positive moments of mechanics maintainability and low cost compared to other transmissions. But if the gearbox is more, all the advantages begin to flicker unpleasantly.

Wheel gearboxes are unpleasant, but often occurring on mechanics. In general, if something is more in the car when driving, then this thing is unpleasant, and even more unpleasant when there is an understanding that is faulty one of the main aggregates of the car. Such a problem is distributed not only on domestic carsmobile, but also on foreign cars.

If you are interested in renting special equipment - Dakar Stroy will help you with this.

Oil: maybe the reason in it?

There are several reasons why the gearbox starts to swell. The first, most common, oil level in the box. Many motorists do not give the meaning of the need to control the oil level in the gearbox. This leads to oil starvation in the main fifth transmission, which is above the rest. Due to the lack of oil, bearings begin to overheat and fail. This is accompanied by high tone, which manifests itself when moving on the fifth gear. There is such a disease overflow by 100 - 200 grams transmission Oil Above the level with its constant control.

Some may say that overflowing oil will cause it through the sealing compounds. That this does not happen, it is necessary first of all to clean the Sapun, and in the second, pour oil parts, gradually. For example, first 100 grams, and after some time, in the absence of leaks, still so much. You can also add a second seal on the Kutis kole.

The next, not less common cause of the sound of the gearbox is the poor quality of the transmission oil, filled into the checkp or incorrectly selected. If we talk about domestic cars, For example, the use of the APIGL-5 category oil pumps in the transmission pumps, leads to rapid wear of synchronizers, which will cause noise of the box when switching. Therefore, it is necessary to use the transmission of the APIGL-4 class. Domestic oils It is quite difficult to find this classification, so you have to use lubricants of foreign manufacturers. But their use allows you to significantly extend the service life of the gearbox, avoiding different sounds when moving.

In addition, the insufficient or excessive viscosity of the oil used also affects the wear of the box parts and the availability of sound when it works. For example, a strongly thick oil with a viscosity of 85W-90 creates a solid film, protecting the gears from wear, but it makes it difficult to access lubrication to some details of the box, which may suffer due to oil starvation, prematurely fail. The gear shift will also be difficult due to the need for synchronizers to squeeze the surplus oil, which will again lead to the rapid wear of the parts. The first sign of a very thick oil will be on the cold and its disappearance on the heated unit.

Too liquid oil will cause the opposite effect, in which the oil film disappear will occur, accelerating wear of the gearbox parts, which will be accompanied again and the hum.

It is necessary to closely carefully approach the choice of transmission oil according to the recommendations of the manufacturer and experienced servicemen.

Additives to the oil: Is it possible to do without repair?

If the oil change does not help, the gearbox will, then it is necessary to repair the unit. Many can say about adding additives, but it does not help 80 percent of cases. According to the reviews of many motorists, adding additives can only force or not fully muffle sound support, but I will not finally solve the problem.

Chemically active substances contained in the additives-revitalizes form a metal-ceramic layer on the surface of the worn gears and bearings, which, according to the manufacturer, restores the geometry of parts and compensates for wear. Of course, if the turn of the gearbox is heard almost noticeably, it only began, the addition, for example, Hado, may well delay the problem with the repair of the checkpoint. But may not help if the problem is already so much, and the wear of the assembly units is significant. Then the repair is accurate.

Diagnosis and repair

As for the repair of the CAT, it is very important for the start to conduct the correct diagnosis. possible malfunction Aggregate, try to determine why the box gives howl without removing the aggregate. Typically, the box will not work in all modes, but at some speeds. If the howl accompanies movement by 1,2,3 transmissions, then this usually indicates problems with the bearing connecting the primary and secondary shafts, more precisely, its wear. The only way out will be replaced. But there is a small nuance - if a needle bearing, not having a clip, then simple replacement The needles may not help. At the same time it will be necessary to replace the shafts. And this is a serious repair.

It is also possible for the presence of a work pair of gears located on the primary and secondary shafts of these gears. Or with poor factory processing and installation after repair. One of the characteristic traits of the wear of the gear, it is a war-loaded load and its decline in the absence of traction. Worn bearing will be noise anyway - there is a load or not. But it is possible to determine exactly the causes of the transmission only by showing a specialist if the repair is done with your own hands.

If you are attended by the 5th gear, the priority, what needs to be done is to check and add oil into the unit if necessary, as already mentioned earlier. But if it does not help, it is most likely necessary to replace the gear of the fifth gear. This is determined by opening the box. Previously, by sound at high speed, it is possible to determine the cause - with a frankly worn out of the gear, with a peak of over 100 km / h - most likely, the bearing.

If the front-wheel drive car is working on all transmissions, then the high probability of wear of the primary shaft bearing. But his replacement often does not lead to a positive result, therefore it is not recommended to change it in the presence of a minor war.

Or maybe it's not a box at all?

Conducting the diagnostics of the gearbox must necessarily consider the fact that in the presence of a constantly increasing warning on all transmissions guilty in origin of sounds can be not only a gearbox. On models with a classic drive, the source of the war can be a rear axle reducer having a conical hypoid transmission. With the wear of the teeth, the gears or with a significant louche of the bearing bearing will accompany all the modes of movement. Such symptoms also accompany the all-wheel drive vehicle during the fault of the front axle. The sound will come from the center of the cabin, and is observed with loads.

Summing up

Doing the repair of a singing gearbox must be important to remember the poor quality of the manufactured aggregates and spare parts. It is not significant that the purchased parts or aggregates are new - defects can be in them. Sometimes, with minor noise in the checkp. It is easier to add the sound of the radio tape recorder in the cabin than trying to eliminate cricket several times to go through the box.

Good luck on the roads!

Well no

Mechanical gearboxes of cars are often frightening drivers with various sounds, which from time to time comes from the subsoil of simple in essence of the device. As a rule, motorists themselves are guilty of their occurrence. But there are sounds that appear for the reasons independent of them. We understand why "sings" the box and whether it is necessary to be afraid.

How is the "mechanics"

Before you deepen into the nature of the sounds, we turn to the design of the gearbox and explain its device "on the fingers".

As you know, the engine internal combustion It is not capable of transmitting the maximum torque and power on the wheel of a car with idling. To ensure maximum return, he needs to go to optimal turnover (usually considerable). You can do this using a gearbox that changes the transfer ratio, thereby facilitating the life of the motor and hanging the car with high speed.

MCP is a device that allows stepwise to change the gear ratio. In fact, it is a metal box, inside of which there are two or three parallel shaft with gears defining the speed of rotation of the secondary (slave) shaft and, accordingly, wheels of the car - through main gear and differential. The task of all this design is to pass the torque from the engine flywheel to the wheels. Combining the gears in various combinations among themselves, we get a different gear ratio.

The gears of the secondary shaft are mobile and connected to it with the help of the couplings that perform the role of locks. The closure and blur coupling, the driver connects and disables one or another. At the same time, one coupling is used for two transmissions. Just here and lies one of the reasons for the appearance of unpleasant sounds.

Creepy grinds when moving to the next speed

When switching gear, drivers often forget to squeeze the grip or do not harm the pedal to the end. After that hear the frightening metal clandage from the box - this noise comes from gears, which cannot engage with each other.

Why is this happening? When we derive from the engagement one of the couplings, the secondary shaft rotates at one speed, and the gear of the next transmission is to another. To turn on the transmission, you need to synchronize the rotation speeds of the shaft and gears. To do this, the engine is briefly separated from the transmission, squeezing the clutch. When the engine is disconnected from the transmission, the turnover is aligned, and the coupling comes in engaging from the gear of the next gear. Additional assistance in speed equalization is provided by special devices - synchronizers.

They work as follows. When choosing gear, the switching plug moves the clutch towards the gear of the selected gear. The effort through the cruck is transmitted to one of the blocking rings, which, together with the coupling, moves towards the included gear. In conjugated surfaces, friction force arises, which rotates the blocking ring until it stops in a crush. The speed of rotation of the gear and synchronizer are aligned, the gear is toughly connected to the shaft and the transmission turns on.

Thus, with an open clutch, the torque from the wheels with synchronizers accelerates the secondary shaft (when switching down) or stops the primary shaft of the box (when switching up). Without pressing the clutch, it is difficult to achieve accurate coincidence of rotational frequencies. That is why the programs are either not included, or are included with loud unpleasant sound. At the same time, the teeth are incorrectly engaged in engagement and touch each other with ridges. This leads to excessive loads on the gears and can cause their breakdowns.

There is such a sound sometimes when the clutch pedal is squeezed - in this case, it sounds like a sentence to synchronizers: you can prepare a round sum for repairing the box.

Crunch when turning on the reverse

Toropic drivers often try to turn on the transmission of the reverse when the car has not yet stopped and continues to roll forward. In this case, all the same metallic grinds is heard.

The secret of these sounds is simple: the rear transmission is implemented using a guide of an intermediate gear that rotates in the opposite direction. When turning on the rear transmission, the slots simply cannot engage with the reversing gears. That is why it is almost unrealistic to turn on the rear gear on the go. And the sounds from the box are explicitly hinting that first need to stop completely, and only then turn on the reverse.

Howl when moving reverse

And now we answer the question, which sooner or later ask, perhaps, all the motorists: why is the car strangely in motion by reverse?

And again appeal to the gearbox device. The whole thing is to use for the rear gear-type gear - simpler and more cheap in the manufacture. If the gears of the front turn are applied by the gears, then on rear transmission They are spoiled.

The advantages of the chickens are the ability to transmit large loads. They engage with each other smoothly and noisy. At the same time, the stain of the pairing is relatively large. But they also have a disadvantage of them: when there is an arbitrary gear, a moment appears, directed along the axis. Therefore, they simply need stubborn bearings. In addition, a large spancy of contact increases friction losses - part of the energy goes to useless heating.

The reversing reversing gears withstand smaller loads and work noisily, but their tasks are performed properly. They are cheap and cost without expensive synchronizers. Purpose gears always have an almost inconspicuous gap in the pairing. With their work there is a continuous knock, which occurs when the gear wheels contact with each other. This creates the ever-speaking sound.

Thus, on strange commercial sounds from the gearbox, arising when driving back, pay attention. The box is properly, repairing it is not required.

The gearbox is one of the most complex mechanisms in the entire car. With it, the complexity of the design can be harvested except that the engine. This is the reason why the box is often even more expensive power aggregate. To understand all the features of this process, it is enough to consider the gearboxes from the inside - this will give an understanding of the high complexity and the technologicality of all the mechanisms built into the case. Repair should be made exclusively professional, otherwise the unit will not be able to undergo a sufficient amount of time. It should be understood that the reliability of the car's trip depends on the quality of the box work, the convenience of its operation and the physical ability to go to long-distance travel without fear of terrible breakdowns.

The box can show a variety of trouble during operation, but one of the most common manifestations of breakage is a hum in the gearbox. The hum may be of different intensity, tone and strength. You can barely notice it, and sometimes the buzz is worth such that overclocking the car to high speed or turn the engine to high speeds simply do not want. Sometimes such a hum is only evidence of any technological feature of the box. Sometimes it occurs after repair when the details are not fully suitable for each other. In this case, it is not critical, but it is possible to remove the rumble only by repairs. Let's consider the reasons that make you feel the growing discomfort when traveling is not a car and feel unpleasant sounds from under the hood.

The box of the machine - the rumble is definitely not good

If you have an automatic gearbox, a variator or robotic mechanic with automatic switching, the buzz to you definitely does not foreshadow anything good. On any service, one disassembly assembly your box will cost fabulous money. Today you will not too much please spare parts. Sometimes it is better to listen to the hum, than to hear the price that is necessary to eliminate it. Take advantage of specialists to diagnose gearbox, but remember that the complete diagnosis of your automaton is possible only if the box is dismantled. The most frequent causes of the power of automatic gearboxes are as follows:

• in the usual machine or in robotic box One of the elements of the main pair, giving the backlash in work;
• the gears do not fall on each other in normal modes, there is an excessive friction of the mechanisms in the box;
• for the Gul Variator, almost accurately means death or the need for propellant - stretching of the main working mechanisms is not so rare;
• also, the box can buzz due to poor mounting semi-axes, which causes the backlash on the connecting places and a rather strong hum;
• often bury the bearings, which failed, they will definitely show themselves in the near future;
• erased teeth on the leading gear or on the shaft will mean the presence of a backlash and a constant hum on one or more transmissions.

Often, some other troubles with a gearbox begin to occur with the roiler. For example, the PPC begins to throw away one of the gears after you release the gas pedal to slow down. This can be to blame for a fork gear, but it all depends on the box, its type, designs and other features. If for the mechanics such a problem is quite simple, then for the automaton, yielding transmissions in unauthorized mode means the impossibility of the operation of the car. Otherwise, the trip on such a car will be unsafe. So always follow the sounds that appear from the machine and contact the service center to eliminate them.

Mechanical gearboxes - hum for many reasons

In the mechanics, the causes of the occurrence of the roast in the gearboxes are not less than in automatic boxes. Need to remember that mechanical box Pretty gentle, loves moderate operation and the absence of sharp movements. This also applies to sports boxes that are most protected from damage at sports drive modes. Nevertheless, such boxes are considered more reliable and endless than automatic types. This is a rather controversial truth, because there are different machines and there are various mechanical PPC. Many car enthusiasts prefer mechanics for a rather low recovery price. Although it depends on which reason caused a hum in the gearbox:

• worn or unequal replacement of the elements of the main pair - hum may continue for a long time without negative consequences, but in the end, the box will fail;
• the driving bearings were wear out - they will be just a few weeks of active exploitation and break down, caused the cause of not too pleasant consequences;
• gears gears - if the roe is heard only on one transmission, the culprit of such trouble is the gear of this transmission;
• the poor-quality assembly of the box is often the reason that humbles arise due to the inconsistency of the shaft hit on the gears;
• the poor work of the transmission mechanism leads to the fact that the inclusions are inaccurate and uneven;
• often, individual and unforeseen problems occur in mechanical boxes, which are diagnosed only after disassembly.

Such troubles are possible in every car. Of course, domestic cars become more frequent visitors to professional service stations. But often and expensive technological foreign cars come to the station with the issues of the gul of the gearbox. It should be noted that in most cases high-end cars do not provide such problems. They are fulfilled as high quality and can serve for many years without any questions. But in some cases the culprit of the box breakdown is not an engineer or a collector at the factory, but the driver himself.

What should I do if the buzz began to come from the box?

The best solution in this situation is to immediately wrap at a good station. maintenance For information on the nature of this hum. If a specialist after diagnostics tells that the main pair of depreciation began, or other gears of the box, you can safely ride a few more weeks, collecting money on repair work. But remember that the wear of the shaft of the main pair is sometimes a negative impact on the state of all gearbox mechanisms. So you can easily bring the situation to the fact that your box will have to send to overhaul or even replacement. The box repair algorithm is:

• bring a car to high-quality service with a fairly large number of specialists and good equipment for repair;
• book to start disassembly and complete detailed diagnostics of the gearbox to determine problems;
• when identifying a problem, estimate the cost of restoring the machine and the potential repair of your box;
• take the decision based on the proposed facts and the information provided from the specialists;
• order repair of the gearbox of the professionals that you completely trust - it is impossible to allow poor repair quality;
• install only original expensive parts inside the box, as they will be able to last for a long time and possess a guarantee.

One of the most expensive processes in the transfer of the gearbox is disassembly and diagnostics. Then everything is performed by democratic rates of a hundred. You need to remember this when choosing details for your gearbox. It is best to take advantage of the original factory versions of spare parts to completely exclude trouble in the near future. So you will save on subsequent repairs and can simply make the necessary tasks for one disassembly process. It should not be saved on the details and on the quality of the work done, as this may adversely affect the operation of the aggregate. We suggest to consider the reasons for the Gula in the box, which experts say:

Let's sum up

Many motorists face such a problem as the gear of the gearbox. It can be an automatic or manual box, each version of a modern robot or such a fashionable variator. There are dozens of diseases of technical components and aggregates that can negatively affect this part of the configuration of your car. Therefore, you should pay special attention For those features that the checkpoint provides for operation. If you simply miss the moment of starting the burying of bearings or other parts, then you can soon be the cost of expensive without the possibility of moving in the car.

There are many types of motorists. Some want the ideal work of their vehicle, others are pleased with the fact that while the car goes, and nothing to repair it. But most owners vehicle They want the basic nodes of the machine to work well and efficiently. Therefore, do not neglect the good diagnosis to find out which part of the box causes an unpleasant hum. Most likely, after such a diagnostics, you want to recover the node. And your car had such problems with the checkpoint, which caused an unpleasant hum?