What is ATF liquid? Characteristics and types of transmission fluid for automatic transmission. What to pour into automatic transmission? How to determine the required viscosity

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"Transmission oil in an automatic transmission is usually replaced every 60 thousand km." (From "Manual for repair and maintenance").

Techinari - the people are serious, like the goddess itself, whom they worship. The technique does not tolerate inaccuracies, or, God forbid, some jokes. It is extremely accurate in everything, including language, you mean terminology. It says "Shablor's valve", which means that the "valve" and it is "shab". And if, on the contrary, it is written: "Dilute the Swedik", then there is nowhere to go - it is necessary to breed ...

About terminology

The conversation about her did not accidentally come. From the point of view of terminology given by us the phrase "manual" a little not "reaches". Smacks, sorry, technical "phenya".

And the case is as follows. In automatic transmissions, no oil is poured into automatic transmissions, but a liquid specially designed for these purposes for automatic transmissions, which is confirmed by the ATF English-speaking abbreviation (Automatic Transmission Fluid), always present on the packaging of this product.

It would seem what difference is oil or liquid? No. There is a difference, and essential. Oil in the technique is called a substance used primarily to lubricate the driving surfaces of parts and mechanisms. In contrast to it, the liquid used in the automatic transmission performs many other functions, oil at all is at all. Yes, it works in beggar for motor and transmission oils. That's about it and talk.

The fundamental difference of automatic transmissions from mechanical is that when moving the car between crankshaft The engine and the primary shaft of the automatic transmission is not a rigid connection. The role of the well-known clutch is assigned to the hydrodynamic transformer (GDT). It is he who transfers the torque from the engine to the box. The main acting person, i.e. Working body is ATF.

In addition, ATF is used to transmit control pressure on multi-disc clutch friction, causing the inclusion of a transmission.

In the process of operation, the components and mechanisms of the automatic transmission are experiencing serious thermal loads. The temperature on the surface of the frictional at the time of switching of transmission reaches 300-400 o C. Intensive heating of the hydrotransformer occurs. When driving in mode full power Its temperature can reach 150 o C.

Ensuring heat sink from automatic transmission and resetting heat into the atmosphere also occur with transmission fluid.

Moreover, ATF should still, not oxidizing high temperatures And not foaming, provide lubrication of gear mechanisms, bearings and other parts subject to abrasion and education of scaling. To do this, the fluid add a whole complex of additives. Moreover, to exercise your properties to the full extent, it should in the entire range of permissible operating temperatures: from -40 o to +150 o C.

One food is preparing, one erases, one children raises ... hard!

And you say: oil ...

Why?

Chemists-technology on glory tried, creating a "cunning" liquid, but still have not been able to provide such a resource for its work so that during the operation of the car it would be possible to forget about the very existence of ATF. There are several reasons for that.

First, even if the automatic transmission is sealed and does not have the leaks, during operation, the amount of fluid decreases due to the removal of its vapors through the system of ventilation of the automatic transmission, equipped with a valve - "Sapoon". Therefore, for maintenance, it is necessary to add transmission fluid to the operational level.

This procedure is easy if the automatic transmission has a tube to control the level of fluid with a dipstick. Many modern boxes are not equipped with a dipstick. This is especially characteristic of European manufacturers, persistently trying to remove the inept car owner (and they are apparently the majority) from their service personnel.

Secondly, with long-term operation, the transmission fluid sooner or later loses physico-chemical properties, so necessary to it for the execution of numerous useful functions. Due to the evaporation of light fractions, there is an increase in its viscosity above the permissible level. Missionary additives produce their resource.

Transmission fluid during the entire period of operation in a normally working box should remain clean. Only a small change in its color is allowed - it darkens.

Dirty black liquid with a specific smell of Gary is an indicator that the box is needed not to replace the fluid, but a serious repair.

Experts recommend changing oil after running by a car of 50-70 thousand km, if the car is operated as usual, and after 30-40 thousand km - with a very intense ("Police") ride. Once again, note that the indication to the replacement of the fluid is not its color, but only the magnitude of the machine's mileage. If, of course, the automatic transmission is properly.

What?

The recommended brand of transmission fluid is usually indicated in the "repair and maintenance manual" of the car. If this information is not available, it is useful to know the following. Despite the variety of trademarks, what you need always has an ATF abbreviation. The most common brand ATF is dexron (usually with Roman numbers I, II or III). The greater the figure, the higher the quality of the fluid and modern automatic boxin which it is used. For cars, Ford brand is recommended to use dexron-megop fluid. These liquids, like the overwhelming majority of the existing now on sale, are made on a mineral basis and have red. All of them are usually compatible with each other.

As usual, the original producers developing yellow and green colors for some of their cars. Mix them with liquids of their native red color is ultimately not recommended, and how much would it happen ...

Recently, ATF appears on a synthetic basis (Synthetic ATF). The accompanying technical documentation argues that "Synthetics" provides good fluidity at temperatures to -48 o C, better stability at high temperatures and an increased service life. At the same time, the synthetic transmission fluid is fully compatible with the mineral ATF (again, in contrast to synthetic engine oil).

The cost of one liter "Synthetics" is about 10 US dollars, while a liter of mineral ATF costs 3-4 dollars.

Recommend it to the use of "where we fell" we will not risk. This is the case, as they say, heads and wallet. If the use of synthetics is particularly stipulated by the "manual ..." (for example, for automatic transmission type 5, which some brands are equipped with bMW cars), There is a sacred business here - you have to go for big expenses.

In total, the automatic transmission of various types can refuel from 7 to 15 liters. transmission fluid. However, this does not mean that for replacement you need to purchase such an insane amount of ATF. Here manifests the fundamental difference of the process of replacing fluid from the change of engine oil in the engine.

The fact is that when replacing ATF you will be able to merge no more than 50% of the total volume. Your dexterity and skill do not have any constructive features of the automatic transmission. You can completely change the transmission fluid only with full disassembly of the box. Before you go to the store, carefully read technical documentation. Sometimes it indicates the full ATF volume, sometimes the volume to be replaced. Do not forget to also purchase a new filter element.

How?

It is necessary to drain the transmission fluid from a heated automatic transmission, for which it is necessary to drive a dozen-other kilometers by car before draining.

Take care of precautions: fluid temperature can be very high. As a rule, it is possible to drain the drain plug for a drain, but ... today, apparently, not our day. We were not lucky. Rather, Mister Mikhail Gulut-Kin was not lucky, delusually staged on a chair under the car: the A4LD brand box, which is equipped with a Ford Scorpio car, drain plug has no. Surely forgotten? A reasonable assumption was expressed that it was not forgetfulness, but fool protection: Want to merge - unscrew the pallet. You will unscrew - you see the filter.

In some automatic transmission structures, for example, on Mercedes cars, it is possible to drain the transmission fluid not only from the pallet, but also from the torque converter through the threaded plug.

Having removed the pallet, do not rush to wash it. First, look, if there is no extraneous deposit on its inner surface, indicating the mechanical wear of the Details of the automatic transmission. Only the presence of a slight amount of metallic dust on the captive magnet, placed in the corner of the pallet.

When servicing individual types of automatic transmission, starting the pallet, you will not detect the filter element. Do not worry - it happens. For example, in the AW50-40 LE brand box installed on Opel Vectra, the filter is located so that it can be replaced only with overhaul boxes.

Mounting a new filter element, do not forget to install all gaskets and sealing rings included in the filter kit.

After refueling the required amount of ATF, set the automatic transmission mode selector to the position required for checking the liquid level and check it when the engine is running.

By making a short trip, repeat the measurement and bring the level to the norm. Inspect the pallet for the absence of lech.

Other details of the oil replacement procedure can be clarified by examining the photographic materials. Liked business. As one of our familiar says, "chase and do not be sad!"

  • Reprint is allowed only with the permission of the author and subject to the placement of reference to the source

WhyATF. oil is so important in automatic transmission

ATF - AutomaticTransmission Fluid, oil (liquid) for automatic transmissions, in the automatic transmission performs several functions at once, the main of which are:

  • Lubrication
  • Transferring effort
  • Cooling details

Decreased wear

The friction coefficient is very important, which provides liquid in friction clutches. If the coefficient is too small, the box will be stopped if it is too large, it will work with jerks and quickly wear out.

Life timeATF. Oils in an automatic transmission

Oil in automatic transmission - ATF (Automatik Transmission Fluid) has its own service life, by its expiration of the fluid property changes and the entire automatic transmission ceases to work as it should be. During the service life, the contamination is accumulated in the box, which are the products of wear of gears and frictions, and the products of oxidation of the fluid itself.


In most automatic transmission, oil filter In the pallet serves only as a contraloan detail and so rude that it will only detain the chips formed during the emergency operation of the box. Therefore, pollution can, both circulate together with liquid, and form precipitation and sludge in the hydrotransformer, in the pallet, as well as contamination enter the channels and in the solenoids, which leads to their clogging and crash box. Therefore, the liquid in the automatic transmission must be changed periodically.

Some manufacturers, for example, Mercedes Benz., tried to produce automatic transmission with "life-long" fill, but after accumulated negative experience, it was necessary to refuse this practice.

Now almost all manufacturers recommend replacing fluid with a certain frequency, which is affected by the operating conditions of the car. If we summarize recommendations for timing, then on average it turns out that ATF need to be replaced at least once every 60,000 mileage kilometersBut each automaker may differ this period.

If you are operating a car in urban mode, it is recommended to change ATF oil into automatic transmission every 40,000 mileage kilometers.

Full or partial replacementATF. oils (liquids) in automatic transmission

In the general case, the replacement procedure climbs as a plums of a part of the fluid through the tube in the pallet and its replenishment through the hole in oil probe. Now, with the complication of the designs of boxes and the release of units without probe, the procedure for such a replacement is somewhat more complicated, but did not change fundamentally.

Replacing the oil in automatic transmission is two types:

  • Full replacement of ATF oil in automatic transmission
  • Partial oil change in automatic transmission

We will assume that in the middle box contains 10 liters of ATF liquid. With the standard replacement procedure, the maximum half of the container is solved from the box - five liters, the rest will still splash in the channels and in the "Bublik" of the torque converter. When plum, oil, of course takes with him part of wear products, but most of Pollution will remain inside the automatic transmission. Such a replacement is called partial and practiced everywhere.

Unfortunately, motorists usually produce partial replacement of fluid in automatic transmission.

Causes of partial replacementATF liquid in automatic transmission:

  • Saving money. And, first of all, this applies not to the cost of a procedure that is cheaper full replacement Oils in automatic transmission, and additional costs for ATF oil needed to complete waste disintegration from the gearbox system.
  • Physical accessibility. Partial change of oil in the automatic transmission is produced almost in any service. For complete oil replacement, special equipment is necessary.

Disadvantages of partial replacement of oil in automatic transmission:

  • About half of the contaminants of the automatic box remains inside.

About half of the oil remains in the system, partially lost its properties.

Full replacement of ATF oil in automatic transmission

Full replacement is a much more rare procedure, but its effectiveness is not comparable to partial replacement. Full replacement is made using special equipmentwhich allows you to use special compositions For flushing automatic transmission.


In the photo: Machine for washing the engine Gear Tronic, using specialized flushing for automatic transmission

Advantages of complete replacementATF oil in automatic transmission:

  • Full oil renewal in automatic transmission
  • Layout of all contamination and processing products from automatic transmission
  • Extension of the service life of automatic transmission

As statistics show, additional costs for full replace ATF. Oils in the automatic transmission are repeatedly paying off due to the extension of the ACAP service.

The procedure for the complete replacement of the automatic transmission of automatic transmission is very popular in Russia in the Far East and in Siberia, where heavy conditions Operating passenger transport justify additional costs. In the central regions of Russia, car owners know that this technology is quite small.

The importance of choosing oil for replacement in automatic transmission

When replacing oil in the automatic transmission, we recommend with all the responsibility to take select ATF. liquids. For example, Liqui Moly company produces oils not only fully relevant to the requirements manufacturers of automatic transmissions, but also lays an additional work resource for all basic parameters.

How to choose optimal and best oil For your gearbox.

Oil should be selected in accordance with the tolerances that are specified in the technical documentation for the car. If you do not have the opportunity to take advantage of any reason by the manual, then you can easily choose the necessary ATF liquid in the selection catalog

And. These are the most popular fluids that have the main tolerances and specifications of car manufacturers and automatic automatic aggregates.

- Suitable for almost all CVT variators.

Until recently, it was believed that the automatic transmission resource is rarely when it exceeds 200 thousand mileage kilometers, but regularly, once every 60 thousand km., Replacing the ATF oil with flushing is capable of at least twice to increase it.

For proper and timely service, the car will respond with an increase in its service life.

;

ATF SP3 oils are the synthetics that was developed for four- and five-speed transmission units of the automation type installed in the Mitsubishi brand cars. In addition, this petroleum product can be poured into transmissions that are analogues of Mitsubishi gearbox (Hendai, Kia), with the requirements of the Diaqueen specification.

Similar lubricant is made of high quality oil basics (PAO). Basic oils Place an increased viscous coefficient. In addition, ATP SP 3 4 l is characterized by an optimal set of additive elements that provide effective protection against wear, excellent frictional characteristics. All this allows you to smoothly switch the modes of the transmission unit. The lubricant has excellent temperature-viscous indicators, perfectly opposes shifts. Increased mechanical destruction resistance and excellent antioxidant properties make it possible to maintain the initial parameters of a very long time.

What is ATF.

ATF is decrypted as a liquid for an automatic transmission switch. As you can see, the decryption is quite simple. Such lubrication is used exclusively in automation, specific variator transmissions. It is almost not used in robots. ATF is intended for lubricating transmission parts, transmitting torque from the motor to the wheel part through the checkpoint.

ATF operating temperature is about eighty-ninety-five degrees. In summer traffic jams, the car can heat up to one hundred fifty degrees. It is determined by the fact that the automation does not have a rigid transmission of torque from the motor to the wheel part. In view of this, it happens that the engine works too powerfully. Excessive energy is absorbed by lubrication, consumed for friction.

Large volumes of petroleum products undergoing high pressure form a medium in which ATF can foam. Because of this, the car and transmission parts can oxidize. In view of this, the petroleum product should have the necessary additive elements that provide minimization of oxidation.

The ATF operational resource is approximately fifty-seventy thousand kilometers. It must be remembered that after this period is required to implement a mandatory change of consuming.


Characteristics of ATF SP3 oils, different manufacturers

Few people know that such lubricants are prone to volatile. In view of this, certain manufacturers put measuring probes in their own automatic type gearboxes. They make it possible to check the level of the car at any time.

The average cost of one liter ATF is 700-800 rubles. For standard automatic transmission, approximately eight ten liters of consumables are required.

Use, operational performance

Transmission zIC oil ATF is intended for Mitsubishi automation. The manufacturer advises to apply a similar machine exclusively in the "Mitsubishnyh" automatic transmission. In addition, ZiC ATF SP3 4 L can be used in Hyundai cars, Kia equipped with automatic transmission of the same design as Mitsubishi. Lubrication can replace ATF SP 2 4 L oil. It is possible to apply in servo drives, steering amplifiers on hydraulics.

Description technical characteristics "ZIC ATF SP 3" is:

  • kinematic viscosity - 38 WST (with forty degrees), 7 WST (with hundred degrees);
  • flame temperature - two hundred thirty degrees;
  • frozenation temperature - minus forty two degrees;
  • density at thirty degrees - 0.84 kg / l;
  • viscous coefficient - one hundred fifty one;
  • shade - reddish.

Pluses consummer, standards

ZiC ATF SP 3, manufactured in 4 liters, has the following advantages:

  • thanks to the excellent cleansing properties and resistance to oxidation, the lubricant ensures cleaning of the oil complex, has a maximum operational period at least fifty thousand kilometers;
  • stable friction characteristics to transfer the moment of rotation. Due to this speed, smoothly switches in various temperature conditions;
  • preservation of good fluidity in low-temperature conditions, the creation of a solid lubricant film in high-temperature conditions. All this increases the operational period of the transmission;
  • preventing the appearance of varnish, curb and sludge formations, reliable protection Corrosion automatic oil coolers.

Transmission oil Zic ATF SP 3

The machine complies with the standards of Mitsubishi Diak. ATP SP 3, "Hyundai ATF SP 3". Before purchasing a consumable, you need to make sure that it is in accordance with the recommendations of the manufacturer of the car.

How to store petroleum products, safety

The consumables storage rules are:

  • do not allow contact of petroleum products with straight solar rays;
  • capacities that are packed in boxes from cardboard, you need to protect against dampness and keep indoors with low humidity;
  • barrels are recommended to be stored in a dry room on pallets or racks;
  • outside the room barrels you need to put on the side. Tubes on pallets should be placed horizontally. The barrels must be stacked either under the canopy or under the awning.

Information on health protection, security rules are written in the relevant section of the operational manual attached to the petroleum product.


"Transmission oil in an automatic transmission is usually replaced every 60 thousand km." (From the "Manual for Repair and Technical Services"). About what, why, what and how, telling the masters of the company.

Techinari - the people are serious, like the goddess itself, whom they worship. The technique does not tolerate inaccuracies, or, God forbid, some jokes. It is extremely accurate in everything, including language, you mean terminology. It says "Shablor's valve", which means that the "valve" and it is "shab". And if, on the contrary, it is written: "Dilute the Swedik", then there is nowhere to go - it is necessary to breed ...

About terminology

The conversation about her did not accidentally come. From the point of view of terminology given by us the phrase "manual" a little not "reaches". Smacks, sorry, technical "phenya".

And the case is as follows. In automatic transmissions, no oil is poured into automatic transmissions, but a liquid specially designed for these purposes for automatic transmissions, which is confirmed by the ATF English-speaking abbreviation (Automatic Transmission Fluid), always present on the packaging of this product.

It would seem what difference is oil or liquid? No. There is a difference, and essential. Oil in the technique is called a substance used primarily to lubricate the driving surfaces of parts and mechanisms. In contrast to it, the liquid used in the automatic transmission performs many other functions, oil at all is at all. Yes, it works in beggar for motor and transmission oils. That's about it and talk.

The principal difference of automatic transmissions from mechanical is that when the car is moving between the crankshaft and the primary automatic transmission, there is no hard connection. The role of the well-known clutch is assigned to the hydrodynamic transformer (GDT). It is he who transfers the torque from the engine to the box. The main acting person, i.e. Working body is ATF.

In addition, ATF is used to transmit control pressure on multi-disc clutch friction, causing the inclusion of a transmission.

In the process of operation, the components and mechanisms of the automatic transmission are experiencing serious thermal loads. The temperature on the surface of the frictional at the time of switching of transmission reaches 300-400 o C. Intensive heating of the hydrotransformer occurs. When driving in full power mode, its temperature can reach 150 o C.

Ensuring the heat sink from the automatic transmission and reset the heat into the atmosphere also occurs with the help of a transmission fluid.

Moreover, ATF should still, not oxidizing at high temperatures and not foaming, to provide grease of gear mechanisms, bearings and other parts subject to abrasion and education of scaling. To do this, the fluid add a whole complex of additives. Moreover, to exercise your properties to the full extent, it should in the entire range of permissible operating temperatures: from -40 o to +150 o C.

One food is preparing, one erases, one children raises ... hard!

And you say: oil ...

Why?

Chemists-technology on glory tried, creating a "cunning" liquid, but still have not been able to provide such a resource for its work so that during the operation of the car it would be possible to forget about the very existence of ATF. There are several reasons for that.

First, even if the automatic transmission is sealed and does not have the leaks, during operation, the amount of fluid decreases due to the removal of its vapors through the system of ventilation of the automatic transmission, equipped with a valve - "Sapoon". Therefore, for maintenance, it is necessary to add transmission fluid to the operational level.

This procedure is easy if the automatic transmission has a tube to control the level of fluid with a dipstick. Many modern boxes are not equipped with a dipstick. This is especially characteristic of European manufacturers, persistently trying to remove the inept car owner (and they are apparently the majority) from their service personnel.

Secondly, with long-term operation, the transmission fluid sooner or later loses physico-chemical properties, so necessary to it for the execution of numerous useful functions. Due to the evaporation of light fractions, there is an increase in its viscosity above the permissible level. Missionary additives produce their resource.

Transmission fluid during the entire period of operation in a normally working box should remain clean. Only a small change in its color is allowed - it darkens.

Dirty black liquid with a specific smell of Gary is an indicator that the box is needed not to replace the fluid, but a serious repair.

Experts recommend changing oil after running by a car of 50-70 thousand km, if the car is operated as usual, and after 30-40 thousand km - with a very intense ("Police") ride. Once again, note that the indication to the replacement of the fluid is not its color, but only the magnitude of the machine's mileage. If, of course, the automatic transmission is properly.

What?

The recommended brand of transmission fluid is usually indicated in the "repair and maintenance manual" of the car. If this information is not available, it is useful to know the following. Despite the variety of trademarks, what you need always has an ATF abbreviation. The most common brand ATF is dexron (usually with Roman numbers I, II or III). The greater the digit, the higher the quality of the liquid and the modern automatic box in which it is used. For cars, Ford brand is recommended to use dexron-megop fluid. These liquids, like the overwhelming majority of the existing now on sale, are made on a mineral basis and have red. All of them are usually compatible with each other.

As usual, the original producers developing yellow and green colors for some of their cars. Mix them with liquids of their native red color is ultimately not recommended, and how much would it happen ...

Recently, ATF appears on a synthetic basis (Synthetic ATF). The accompanying technical documentation argues that "Synthetics" provides good fluidity at temperatures to -48 o C, better stability at high temperatures and an increased service life. At the same time, the synthetic transmission fluid is fully compatible with the mineral ATF (again, in contrast to synthetic engine oil).

The cost of one liter "Synthetics" is about 10 US dollars, while a liter of mineral ATF costs 3-4 dollars.

Recommend it to the use of "where we fell" we will not risk. This is the case, as they say, heads and wallet. If the use of synthetics is particularly agreed by the "manual ..." (for example, for the automatic transmission automatic transmission, which is equipped with some BMW car brands), there is a sacred matter here - you have to go for big expenses.

In total, the automatic transmission of various types can refuel from 7 to 15 liters. transmission fluid. However, this does not mean that for replacement you need to purchase such an insane amount of ATF. Here manifests the fundamental difference of the process of replacing fluid from the change of engine oil in the engine.

The fact is that when replacing ATF you will be able to merge no more than 50% of the total volume. Your dexterity and skill do not have any constructive features of the automatic transmission. You can completely change the transmission fluid only with full disassembly of the box. Before you go to the store, carefully examine the technical documentation. Sometimes it indicates the full ATF volume, sometimes the volume to be replaced. Do not forget to also purchase a new filter element.

How?

It is necessary to drain the transmission fluid from a heated automatic transmission, for which it is necessary to drive a dozen-other kilometers by car before draining.

Take care of precautions: fluid temperature can be very high. As a rule, it is possible to drain the drain plug for a drain, but ... today, apparently, not our day. We were not lucky. Rather, the master was not lucky to Mikhail Gulut-Kin, delelly staged on a chair under the car: A4LD brand box, which is equipped with a car Ford Scorpio., drain cork has no. Surely forgotten? A reasonable assumption was expressed that it was not forgetfulness, but fool protection: Want to merge - unscrew the pallet. You will unscrew - you see the filter.

In some automatic transmission structures, for example, on Mercedes cars, it is possible to drain the transmission fluid not only from the pallet, but also from the torque converter through the threaded plug.

Having removed the pallet, do not rush to wash it. First, look, if there is no extraneous deposit on its inner surface, indicating the mechanical wear of the Details of the automatic transmission. Only the presence of a slight amount of metallic dust on the captive magnet, placed in the corner of the pallet.

When servicing individual types of automatic transmission, starting the pallet, you will not detect the filter element. Do not worry - it happens. For example, in the AW50-40 LE brand box, installed on Opel Vectra, the filter is located so that it can be replaced only with overhaul of the box.

Mounting a new filter element, do not forget to install all gaskets and sealing rings included in the filter kit.

After refueling the required amount of ATF, set the automatic transmission mode selector to the position required for checking the liquid level and check it when the engine is running.

By making a short trip, repeat the measurement and bring the level to the norm. Inspect the pallet for the absence of lech.

Other details of the oil replacement procedure can be clarified by examining the photographic materials. Liked business. As one of our familiar says, "chase and do not be sad!"

I have already touched upon the abbreviation "ATF" in the article. But today I want to tell about it in more detail. We will analyze all aspects of the value, decryption, why it is categorically different from liquids in a mechanical transmission, as it works. Really a lot of questions, even there is such a banal - is it a liquid or still oil? Let's deal with ...


Let's start, perhaps with definition.

ATF ( Automatic. TRANSMISSION. Fluid ) - deciphered as a liquid for automatic transmission (automaton). It applies only to "hydrotransformer" automata, also in some variastors, in robots is practically no applied. It serves to lubricate internal nodes, as well as transmission torque from the engine - through transmission - wheels.

In some forums, read - what is called "blood" of the machine, because the liquid is actually red.

Oil - not butter?

Let's start with the easiest question, and what is this oil or not at all? Guys are liquid transmission oil, it is much fat than let's say with mechanical transmissions. This is said by many features Here, the torque is transmitted with the help of a torque converter, and how we already disassembled high pressure - fluid oil. Due to high yield and is called a liquid.

For example transmission oils For mechanics have viscosity tolerances and are divided into winter, summer and universal. Often, you can see such numbers as SAE 70W-85, SAE 80W-90, etc., choose for your weather conditions, but most are now universal.

There are no such tolerances on machine tools! SAE viscosity in these fluids does not apply, they always have to remain fluid in any weather, they should also withstand much larger temperatures than "mechanical" counterparts. AtF, liquids include much load, it is manifested in lubrication, protection of nodes from contamination and oxidation (rust), also from overheating.

So the mechanics can warm up to 60 degrees Celsius when working.

But the machine is often working with temperatures of 90 - 110 degrees. For example, Chevrolet machines can warm up to 120 degrees.

Therefore, the cooling radiators are installed on the machines so that the oil is not burned at high temperatures. So this is the oil, but it is not as two other, transmission mechanical and engine.

Why bright red?

As we have already disassembled from above, ATF oils are not alike any other types of lubrication. And therefore it is impossible to pour it anywhere else if you confuse serious breakdowns. Also, on the contrary - if you pour ordinary "mechanical transmission" into the machine. That is practically instant "death." And such cases were often poured motor oil And after a few kilometers, the automatic transmission stood.

To avoid such incidents, it was customary to paint the ATF in red - that is, this is nothing more than just - the difference, nothing more. Well, think about the red liquid you will never get into the engine, although anything happens ...

How does it workATF liquid?

I already touched on top of a few aspects of work, and now I would like to talk in detail how it works.

Temperature

Averaged working temperature The liquid is about 80 - 95 degrees Celsius, although in certain moments, for example, in traffic jams, it can heal to 150 degrees. But why? Everything is simple - the machine does not have a tight transfer of the moment from the engine - wheels. Therefore, sometimes the engine gives an increased power that does not need wheels to overcome the road resistance - excess energy must be absorbed by oil and spend on friction, height in traffic jams is simply huge.

Foaming and corrosion

Large masses of oils that go under huge pressure create a favorable medium for foaming ATF liquid. And in turn, this process leads to oxidation of the oil itself, and the metal parts. Therefore, the fluid should have the necessary additives to minimize these processes. Moreover, the additives are selected every time different, there are no identical ATF oils. All because the internal structure of the automatic transmission is everywhere different, in some devices there are more metal, in others there is a metal - metal-ceramics, in third steel - bronze, it must be taken into account.

Liquid resource

As you understand this liquid, essentially unique, it works in very unfavorable conditions, but even at such temperatures it can work long thousand kilometers. Its resource is about 50 - 70,000 kilometers. However, it is not necessary to forget that it is not eternal, and after 70,000 kilometers of its properties are lost, the replacement is obligatory.

Evaporation

Not many know, but ATF oils can be disappeared, so some manufacturers install probes (for level measurement) on their automata. The level may fall, due to the deposition of vapors through the system of ventilation of the automatic transmission, simple words through Sapun. Therefore, it is important to monitor the level, this is a kind of mandatory practice.

Why "ATF "is so expensive

And indeed, why the liter can reach the price of 700 - 800 rubles, and about 8 - 10 liters are often needed to the machine? But as you understood from above, it is the most technological fluid, and it is evolving every year.

It is much more perfect than motor oil, and even more so than the usual transmission, hence such prices. However, again, I repeat, it works in an aggressive environment and quite a long period of time, 60 - 70,000 kilometers.

That's so it is ATF OilI think the article you liked. Read our automatic mobile, sign up for updates.

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