Is it possible to slip in a car with an automatic transmission? Is it possible to slip an automatic transmission?

Car equipped automatic transmission, requires certain driving and control rules, and those who wonder whether it is possible to slip with an automatic transmission, especially when it’s winter , don't always get the right answers.

1. The torque converter and friction discs are direct sources of heat; under significant loads, a large amount of thermal energy is released on the automatic transmission, which can be commensurate with the operating temperature of the engine, and sometimes even exceed it. Therefore, any automatic transmission is equipped with a cooling system.

• During prolonged slipping, the temperature of the automatic transmission lubricant increases, which can cause overheating. When it boils over prolonged heating, it ceases to optimally lubricate the parts of the automatic transmission, as a result of which the friction discs “fly”. And this is the direct cause of transmission failure, so it is extremely undesirable to skid for a long time.

2. A poorly warmed-up car is also prohibited from slipping for a long time. In this case, the lubricating fluid is not heated to a certain temperature and experiences the same loads as in the case of overheating. There is no high-quality lubrication - excessive friction of parts occurs, and as a result, their severe wear.

• To drive the car out of the snowdrift, you should move the selector to the position R , with the brake pedal pressed and hold this position for several minutes until the torque converter comes into working condition.

3. The transmission delay and swing principle are suitable for proper slipping in automatic transmissions. During slipping, the main load falls on the torque converter, which fails under the influence of heavy loads.

• The basic rule to remember is to maintain a fixed position when changing gears R to D , with your foot on the brake pedal. Under no circumstances should you use two pedals at the same time - gas and brake.

4. When slipping in a car with automatic transmission, you should avoid sudden impacts from a loose surface onto a hard one. Otherwise, the blow that falls on the axle will lead to its rupture, and it, in turn, will hit the box with enormous force and pierce it.

5. On European cars with high mileage and an old year of manufacture (80 - 90), with an outdated cooling system, you should not skid under any circumstances; here the cooling process occurs directly while driving. Slipping and slipping will lead to overheating and failure of automatic transmission parts.

In order for the car to start smoothly after parking, it is not recommended to brake sharply. When you sharply press the brake pedal, blocked wheels, when moving in a skid, on the snow will create a smooth surface, from which it is much more difficult to move off than just from compacted snow.

If you ask for help from passers-by, who can push the car from behind or in front, depending on the exit position of the car, then slipping will be much easier. Proper operation of the clutch and gas and brake pedals while the car is rocking will help you get out of the snowdrift much easier and without significant wear on the automatic transmission parts.

21.12.2009, 10:29

Greetings, teammates!!

Furian

21.12.2009, 10:31

21.12.2009, 10:35

Still not clear!!
Firstly, when slipping the gears do not shift....
Secondly, why does the oil get hot??

21.12.2009, 11:28

Greetings, teammates!!

Thanks to the heavy snowfall today, the front wheels begin to slip at the slightest pressure on the accelerator pedal. And as you know, the automatic transmission really doesn’t like this. We all learned this by heart like the Lord's Prayer! But I have a question: why doesn’t the automatic machine like slipping?
Is the box heating up?? Due to what? the gears rotate as well as when driving without slipping...
Those. it does not break under load, but when there is no load it immediately breaks down!!

I don't understand. Please explain.

As far as I know, slipping in itself is not dangerous in an automatic transmission; what is important is the fact of sharp traction with the road after slipping.
Those. you are slipping in the snow and suddenly suddenly drive out onto dry asphalt - this is scary, but in my opinion it’s not a big deal.

21.12.2009, 11:35

I also don’t understand why something is heating up there, when in fact it makes no difference whether you are driving or driving and skidding. What's the difference with technology? The result is the same - the wheels spin with acceleration. not clear...

21.12.2009, 11:45

Moreover, we have “VSA” on the automatic transmission, which suffocates the engine and prevents you from slipping too much)))
You press the pedal, but it doesn’t move and there’s no slipping.

21.12.2009, 11:50

Well, there is heating in any situation - both when you drive smoothly and when you skid. When slipping, the heating is greater because the resistance on the wheels is higher than the standard rolling resistance (as during normal driving).
Everywhere and always they say that you can’t skid on an automatic transmission, meaning the standard situation:
the car stands still, the wheels are spinning, the driver accelerates - the speed increases, the force (torque on the wheels) too, the box can still change gears in accordance with the speed, and suddenly - HITCH with the road surface - the mass of the car is at rest, but the driver forces it starts from a standstill at speeds (and in gears) that are not normally intended for this - an impact occurs on the gears and the box can either jam or rupture from high pressure.
When driving on porridge/ice, slipping is inevitable and does not harm the gearbox, unless, of course, you drive wisely and not with your slipper on the floor all the time...

21.12.2009, 12:01

21.12.2009, 12:21

Accordion player, it seems that’s exactly the case

SmileG®

21.12.2009, 12:22

21.12.2009, 14:01

Those. The very fact of slipping is not scary, except for a slightly increased heating (by a non-critical amount)?? Is the moment of traction of the skidded wheels with the road due to excessive pressure in the box at this moment scary? Do I understand correctly?
In principle, yes. However, it must be borne in mind that the longer you skid, the more intensively the box heats up, and repeated long-term slips significantly reduce the life of the box. And if overheating occurs, then you can get it repaired...

21.12.2009, 14:09

ArTiKo, that's right, but today I've already driven 100 km in a manual transmission))) the manual is awesome, the automatic machine silently smokes on the side, and the LSD helps a lot, in short, I accelerated from a standstill through the mess even faster than all-wheel drive cars and sharp 215!!!
Good luck everyone, don't break your machines

21.12.2009, 15:39

And also, when you switch the machine to manual mode, then it is advisable to start and stop in second gear, it turns out very smoothly and without slipping!

This is my first time writing on the forum, so if something goes wrong, don’t be angry.)
You mentioned the possibility of starting from second gear... isn't that harmful for an automatic? ...but I don’t understand the braking at all, because as the speed decreases, the gearbox itself downshifts when braking. Then what was meant by the phrase “...and stop in second gear” (c)?!

21.12.2009, 15:52

You mentioned the possibility of starting from second gear... isn't that harmful for an automatic?

In the case of starting off in the snow, this is definitely not harmful, because... The load on the transmission is minimal when starting hard on asphalt. Although I think that there is nothing wrong with starting off on the asphalt from 2nd gear either.

Today I use manual mode all the way and start in 2nd gear, which is much more effective when accelerating in such a mess.

21.12.2009, 16:00

It is recommended to start from 2nd gear even in our booklet - manual (in the snow, of course).
As for slipping, it’s not a big deal if you drive calmly and don’t let the car constantly move on a large axle box.

21.12.2009, 16:03

In the case of starting in the snow, this is definitely not harmful...

Thank you for your attention to my question.
Then, to continue the topic: at one time, one friend mentioned that he always starts going uphill in second gear... and even on ice. Is this somehow justified, do you think?

21.12.2009, 16:11

It is dangerous for the machine to stand still and slip, if it gets stuck, for example.
Why is it dangerous??

21.12.2009, 16:13

Remember the first snowball fell? ...or rather, he frankly overwhelmed the city... that evening I was standing at an intersection downhill... the traffic light switched to green, I set off in drive, but that was not the case... - according to my feelings, there was not even a slip, the wheels rustled a little and the car remained in place until the next traffic light. Such things.)

Furian

21.12.2009, 16:18

This is because of the vsa system. It stifles the speed when spinning the wheels, among other things. I turn it off all the time.

21.12.2009, 16:21

Furian

But on the contrary, I’m afraid to turn it off... I’m afraid that the car will be dragged too much...

21.12.2009, 16:24

The gears change too quickly, the clutches and the oil in the box begin to get very hot. In such weather, it is better to drive in manual mode to control gear shifting manually. This way it will heat up less with slipping.

The instruction manual says that using manual mode at temperatures below -10 degrees Celsius is not recommended!!!
Why, don't ask... There are no explanations in the manual. Although I’m curious - why?

21.12.2009, 16:26

Mystica, it will carry the car without it. VSA does not work on anticipation, but on actually already started slipping and/or sliding.
In general, I go with her, because... it catches slips well, but if you want to frolic, you can turn it off.

21.12.2009, 16:37

Furian

21.12.2009, 16:41

But for me, with VSA it’s impossible to get the car out of a skid, that’s why I’m cutting it off :) there have already been a couple of cases when I was drifted into oncoming traffic on the ice, and when I try to go onto a safe trajectory, I need to sharply stomp, but everything immediately chokes the car. So the stick has two ends.

21.12.2009, 16:41

Mangoose, frolicking in winter can be fraught) ... personal experience lovers of frolic.)) and taking into account the fact that even in winter I spend a lot of time at the dacha, the path to which lies along “drunk” roads, vsa has helped me out more than a dozen times, because with it it’s more or less clear how bring the car out of the skid, catching this very slip. But without it, I didn’t risk entering a 90-degree turn around 60...))

I agree, in winter I also never turn off the system. Yesterday I went to Sorochany, and there it would have been a little difficult on the village roads without it, although, IMHO, it dulls driving skills, because... you relax with it, realizing that the electronics will do the necessary actions for you.

21.12.2009, 16:57

Furian, across the ice into oncoming traffic... oh... here even your hands won’t always help, let alone electronics... but a stick, yes... has two ends... what can we say about slingshots...)

Added after 3 minutes 28 seconds

Many owners of cars with automatic transmission are interested in the question of what to do if they get stuck in the snow with an automatic transmission. In this case, the driver’s actions are somewhat different from those manipulations that are inherent in cars with “mechanics”. This is primarily due to the design features of automatic transmissions, the algorithm of their operation and switching.

In principle, you can use the method of “swinging” back and forth, but in some cases it may not be effective. In this regard, drivers of cars with automatic transmissions need to study the capabilities of their car and learn how to properly get out of such situations.

What to do if you get stuck in the snow on automatic, we will try to consider in this article. For some reason, there is confidence that it will be useful not only for beginners, but also for experienced drivers who have recently switched to cars with an automatic transmission. Training in driving schools continues year-round and if this occurs in winter, then cadets will be able to gain some driving skills in extreme conditions. For those who are driving an automatic for the first time, they have to independently learn the basics of using such cars in special conditions.

A few words about the features of the “automatic machine”

In order to properly operate such vehicles, you need to know the design features of such components and the rules for their use. The main difference between cars with an automatic transmission is that they do not have a clutch pedal, unlike cars with mechanical boxes transmission This is due to the design features of automatic transmissions, which have rotational movement the crankshaft, the basket, clutch and other parts of this mechanism are not used. Their functions are successfully performed by a torque converter.

In addition to this, the main components of the automatic transmission also include a mechanical planetary gearbox. It is with the help of a torque converter that the torque is transmitted and changed from the power unit to the drive wheels. This transmission is carried out through the operation of a centrifugal pump, two blade machines, a reactor wheel and a working fluid, in the form transmission oil. When this unit operates under extreme conditions, the oil overheats and the automatic transmission may fail.

Features of using automatic transmission in difficult conditions

Such conditions include operating the machine in the cold season. It is during this period that its nodes experience maximum loads. Moreover, this happens not only when the car is moving, but also when the power unit warms up. It is important to have time to change the filter and oil in the box before the cold weather sets in. The use of winter grades of oils significantly reduces the time for warming up the transmission (for example), which extends its service life and saves fuel.

But whether we like it or not, cases when a car finds itself in extreme situations do occur. These can be fully included. On manual cars, the “rocking” method helps out, in which the car is rocked back and forth. At the same time, the driver works intensively with the gear shift lever and clutch pedal.

You can try the same principle on an automatic transmission, but be very careful not to overheat the box. The “swing” on the automatic transmission is done in the “R” or “D” mode. If you are unable to make progress after a few minutes, it is better to stop and think about other ways to solve the problem.

Sometimes you can advance on loose snow if you switch to the lower mode “L” or “1”, “2”. You need to depress the brake pedal, turn on the downshift mode and at the same time smoothly releasing the brake pedal, add fuel to the engine. If the drive wheels do not fit deep into the snow, and the bottom of the body does not sit on the snowdrift, it is sometimes possible to drive out.

Experienced drivers recommend carrying a small amount of sand with you. Using an entrenching tool, you can try to dig the drive wheels out of the loose snow, they get support, and the car gets out of the trap. If trips often take place in areas far from populated areas, it would be good to have a small winch with you. She also helps out in difficult times.

They won’t take up much space in the trunk; they can also help out when slipping in drifts of loose snow. True, it should be noted that putting them on wheels in such conditions is not very pleasant and inconvenient, but you will have to if you do not want to spend a long time in the cold. Help can be obtained from another vehicle that can act as a tow vehicle. Automatic transmission must be turned on "N" mode.

Some tips for those heading out on the road

If your car's route will be far from populated areas, you should take a small supply of food and gasoline with you. Write down the phone numbers of nearby gas stations, cafes or stores that are open 24 hours a day. In an extreme situation, you can get the help you need through them.

It may be very useful to have a flashlight, jacket or blanket in the trunk, as well as a small amount of dry fuel. It burns without smoke or soot, and this will help warm up the air in the cabin of a stuck car. Finally, I would like to remind you of the recommendation of professional rescuers about what to do when you get stuck in the snow in an automatic vehicle, who advise not to leave the stuck car, since they will first of all look for the car. Take the preparation of such a trip carefully and seriously, and you will be able to avoid problems.

Is it possible to slip in a car with an automatic transmission? If possible, then how to do it correctly?

When slipping for a long time, you need to let the gearbox cool down.

The heat sources in the automatic transmission are the turbo transformer and functional discs. If the intensity of work increases, then the heat transfer increases. Basically, the operating temperature is equal to the engine temperature, but from time to time it can be higher. That’s why the automatic transmission cooling system is designed in a special way: its radiator is often built into the radiator of the engine cooling system, or it is installed separately and cooled using air flow.

You can't skid for too long.

Prolonged slipping of a car with an automatic transmission can lead to unpleasant consequences, for example, overheating of the ATF lubricant. If the lubricant reaches a boiling point during heating, it will become unable to perform its function, that is, it will not be able to lubricate the automatic transmission. As a result, the friction discs become faulty. In addition, the friction of the clutches has a detrimental effect on the automatic transmission, increasing the temperature to 250 degrees Celsius. As a result, the transmission often breaks down. You can’t skid for a long time: you need to give the gearbox a rest for a while and not turn off the engine.

You cannot skid if the car engine is not warmed up.

In this case, you will encounter the problems already described. If the ATF fluid is not warmed up enough, that is, its temperature has not reached the optimal value, then the fluid will not have the required consistency for lubrication. Automatic transmission parts operating in conditions of lubricant deficiency will be subject to accelerated wear. If you need to overcome snow, first set the transmission to R mode while keeping your foot on the brake. Wait a bit. Start moving only when the turbo transformer is filled with a sufficient amount of lubricant and begins to operate normally.

Try to delay the transmission.

Now let's deal with the buildup. During slipping, the main part of the load falls on the torque converter, and this is a quick path to failure. As the oil heats up, it loses its quality and the pressure decreases. As a result, the torque converter breaks down and the clutches burn out. Therefore, when slipping for a long time, you need to try to delay the transmission.

Important nuance: It is necessary to change from R to D. This must be fixed: the gear is fixed using the pedal.

What should you watch out for when slipping?

Prolonged movement at high speed significantly shortens the life of the clutches. This must be avoided to prevent rough coupling. In the automatic transmission box there is a planetary gearbox through which the axis passes. When a wheel hits a hard surface, the axle can break. A piece of the axle instantly pierces the transmission shell. Our advice: after you have finished slipping, make sure that there is no hard adhesion to the road surface.

What cars can't be skidded?

In cars that already have a decent service life, especially foreign cars that rolled off the assembly line in the 80s and 90s, the design of the cooling system is not perfect in modern times. Heat generation in a turbo transformer is dangerous. Older European car models also have air-cooled gearboxes. Their outer shells have blades that are supposed to remove heat. It is highly undesirable to slip on such automatic transmissions, because the box only cools while driving. This, of course, does not apply to today’s analogues with automatic transmissions.

Video: Automatic overclocking techniques

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Tips for operating cars with different gearboxes:

1. Sometimes it’s much faster and safer to simply push the car, after working around the wheels with a shovel and removing the snow. When there is at least some opportunity for acceleration, continue driving.

2. The steering wheel must be kept straight - along the trajectory of movement.

3. If you see that the probability of stalling in some place is high, then you need to do the following: carefully, slowly, drive in the opposite direction. If you find yourself in a good rut, from which it will be convenient to accelerate, then, having overcome the obstacle, you will be able to continue further movement.

4. To increase traction when driving, you need to place corrugated mats under the front wheels of the car.

5. To drive smoothly again, you don’t need to brake sharply: otherwise the tires will make the surface slip.

6. On cars with an automatic transmission, the automatic transmission cannot be skidded in place for a long time. Better try to get out by rocking. Use switches R and D: switch in a short period of time. In such situations, if the gearbox has fixed gears, you need to swing it in R and 2 modes.

7. In winter, always carry a regular street sweeper shovel with you: it is stronger than other shovels and will serve well in case of slipping.

8. If you find yourself in a snow drift, do not panic. If you cannot get out yourself, passers-by can help you: ask them to push your car, while you rock the car back and forth. Provide the necessary traction by alternately pressing the gas and brake pedals.

9. Sometimes situations happen when they try to pull the car out of a skid using a cable. In this case, the most important thing is to act smoothly. Before attaching the cable, make sure that the eye is fastened securely enough. After this, set the first gear. When the cable is well tensioned, begin to drive out carefully.

1. Let the box cool down in case of prolonged slipping

The main sources of heat generation in an automatic transmission are the torque converter and friction discs. Moreover, under heavy loads the heat generation is quite large. Operating temperature transmission is comparable to the engine temperature, and may even exceed it. Therefore, cars with automatic transmission have a special cooling system, the radiator of which is either built into the radiator of the engine cooling system, or - much less often! - installed separately and cooled by air flow.

Most often, adverse consequences arise for the very reason that during prolonged slipping in an automatic transmission, the temperature of the automatic transmission lubricant, called ATF (Automatic Transmission Fluid), increases. When heated, this liquid has poor viscosity and sometimes boils. As a result, it ceases to perform its function and no longer lubricates the automatic transmission parts. As a result, the friction discs are destroyed.

We should not forget that when friction clutches rub, the temperature in them also rises sharply - up to 200-250 C. This thermal shock reduces their service life, and in some cases (if you do not stop slipping) leads to instant transmission breakdown.

So, in principle, you can skid, but not for long, periodically giving the box a rest. However, the engine should not be turned off.

2. Do not skid when the car is not warmed up

Similar consequences await you if you start slipping in a cold car. Only in this case, the ATF fluid, on the contrary, has not yet warmed up to the required level and has not acquired the required viscosity. If you act hastily, automatic transmission parts that move with virtually no lubrication will wear out intensively.

Therefore, before trying to drive an automatic transmission out of a snowdrift, turn on R mode with the brake pedal depressed and wait for about a minute. The torque converter itself will pump in the required amount of lubricant, bringing it into working condition - after which you can start rocking the car, trying to pull it out of the snowdrift.

3. Lock the gear (on tiptronics or in mode L1, L2)

Now about the buildup itself. At the moment when the car slips, a huge load is created on the torque converter (sometimes even a shock), which can instantly disable it. As the temperature rises, the oil loses its properties (after all, performance depends on the pressure created in the box by the oil), the pressure drops, and either the torque converter (aka the donut) cuts off, or the clutches burn out - this depends on the situation.

Therefore, when slipping for a long time, you need to fix the gear and not jump from one to another. And most importantly, switching from mode R (reverse) to D (or L1, L2) with a fixed gear can only be done through the brake pedal. You cannot press the gas and brake at the same time!

4. Avoid the possibility of sudden traction after slipping

Any increased load reduces the service life of the clutches. This applies to slipping, towing, and long-term driving at top speed.

There is such a part in an automatic transmission - a differential gearbox. inside there are small but heavy gears, an axle passes right through the entire gearbox housing... If a slipping wheel hits a hard surface, the impact on the axle can be so strong that the axle is torn out, the parts scatter at the speed of a bullet and pierce the automatic transmission housing in several places at once...

Therefore, it is impossible to allow sudden traction with the road to occur after slipping.

What cars are not allowed to slip?

Increased heat generation in the torque converter can be critical if the cooling system has low efficiency (the automatic transmission cooling radiator is clogged with wear products). As a rule, this occurs in cars with high mileage - old American monsters built in the 80-90s. It’s high time for them to change the gearbox, or even better, scrap them themselves.

In addition, on old European and Japanese cars you can find boxes with air system cooling. There are additional external blades on the torque converter housing, with the help of which they organize air flow to remove heat. Such automatic transmissions are cooled while driving, which means it is not recommended to slip on them. However, the above applies only to ancient small cars that are rare among us. They are not intended for use in harsh conditions. Modern “Europeans” and “Japanese” equipped with automatic transmissions are not among those “not allowed to leave the snowdrift”.