If you notice that your automatic transmission has started to twitch and switch late, then this is not a reason for panic. Sometimes it is enough just to wash it and change the oil, but it is important to do this procedure correctly. Today, there are quite a few mechanics at car-care centers who, instead of a full oil change, make a partial replacement, so now we will deal with how to change the oil in an automatic gearbox.
No matter what they write in the instructions, there is a universal rule - to change transmission oil every 40,000 km. It is also important to remember that there are 2 options for changing the oil in the automatic box:
- partial oil change;
- full replacement of oil in the automatic transmission.
Partial replacement of gear oil
The first option, recommended for regular maintenance, is called partial replacement. The essence of such a replacement is as follows: it is necessary to drain the oil from the automatic box through the drain plug, if there is no such plug, then it is necessary to remove the gearbox pan. It is important to understand that all the oil from the automatic transmission does not merge, somewhere half the oil remains. The old oil remains in the mechanism of the automatic gearbox itself, especially in the torque converter bagel, the hydraulic unit channels and solenoids. Therefore, if you simply drain the oil, only half will merge, which is why this method is called partial replacement of transmission oil.
It turns out a partial replacement of oil, it is only half updated. In general, a partial oil change is simple: raise the car on a lift, unscrew the drain plug or remove the entire pan, drain part of the old oil into a special container.
It is desirable to clean the walls of the pallet from contamination, for this there are quite a few special cleaning fluids, for example, Liqui Moly Schnell Reiniger has proven itself well.
Particularly advanced mechanics measure the exact amount of oil that has been drained, after which they fill in the same amount of new oil, this eliminates the need to set the oil level with a dipstick.
If you remove the pan, then almost all automatic transmissions, it becomes possible to replace the oil filter. After the oil has been drained and the filter has been replaced, the cleaned pan must be put in place; to do this, use a new gasket or sealant. The kit to the filter box automatic in most cases includes a gasket. As for fresh oil, it should be poured in small portions through the hole for the dipstick. Of course, you can suck old oil out of the same hole for the dipstick, but for this you need to use a special technique.
It is very important that the oil level in the automatic transmission box is correctly set. It is advisable to first take measurements while the box is in a cold state, and then, after warming up the gearbox, it is also necessary to measure the oil level.
Полная oil change in automatic transmission
This replacement option is more complicated, in this case there is a complete replacement of all the oil in the gearbox, in all parts of the box the old oil does not remain. A complete replacement of the oil in the automatic transmission should be done less often than partial. A full-flow oil change can be carried out in such situations:
- after buying a used car;
- after 100,000 km. run;
- if very often the car drives at high speed and the engine overheats;
- if problems occur during gear changes - malfunction of the solenoid unit.
By making a complete oil change in an automatic transmission, it is also possible to flush all components with special flushing agents, which not only remove contaminants, but also are capable of restoring the operation of blocking the torque converter and the solenoid block.
Full-flow oil change in the box machine is quite long - takes about 1 hour and costs money if you order this service at the service station. In order to completely drain off the old oil, it is necessary to pump fresh oil into the box, which will force out the old oil.
Also an additional amount of oil will be required during the replacement of the automatic transmission filter. In order to fully carry out a full-flow oil change, you will need special equipment that accurately calculates the amount of fresh oil required, and also calculates the amount of old oil that has been drained.
Carrying out a complete replacement of oil in the automatic transmission, it is desirable to use a special tool - Liqui Moly Automatik Getriebeoil Reiniger, which is intended for flushing automatic transmissions, it efficiently cleans the valves and channels of the box, and as a result - improves the efficiency of the automatic transmission.
The process of complete replacement of the automatic transmission oil begins with the fact that the oil level is checked with the help of a dipstick, it is also desirable to carry out a simple diagnosis.
After that it is necessary to connect the flushing unit to the hydraulic system of the automatic gearbox. The easiest way to connect through the hoses of the cooling system box. In many vehicles, you can connect using the clamps provided. It is very important to find a radiator cooling the automatic box, which in most cases is located inside the main radiator of the engine cooling system. If you provide access to the fittings, you can disconnect the supply tubes and connect them to the flushing unit.
After the new system has become hermetic time to start the engine. The flushing unit itself will set the pressure of the fluid and the direction of movement of the oil in the system. If there is insufficient pressure in the box, but this should not be the case, then the installation will detect a box fault, and it will be impossible to replace the oil.
It is also important to know that in some models of cars there are systems with built-in thermostats, and so, in such boxes, if there is no pressure in the radiator circuit, then this is normal. It is enough to wait until the engine warms up, the pressure will appear after the circulation of fluid is restored. To change the oil in such a situation it is necessary to pin the thermostat, it is provided by the developers.
After the installation has been connected, it is time to pour in Liqui Moly Automatik Getriebeoil Reiniger, a flushing fluid that will remove all possible contamination from the gearbox, torque converter, and it will also restore the hydraulic unit and valves (solenoids).
Wash the liquid must be poured into the heated oil, because, with an increased temperature, detergent additives are more active. After the flushing has been flooded, it is necessary to put the box in neutral and parking mode for 6 minutes, in these valve modes the boxes are cleaned best. Further, within 5 minutes it is necessary to switch all modes of the box so that the flushing fluid circulates through all channels. The machine, so as not to leave, it must be kept on the handbrake.
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It is important to know that all flushing is done at idle speed of the motor, that is, gas, increasing the engine speed is not possible, because it will damage the box.
After about 10 minutes of flushing, the unit must be switched to the oil change mode. Installation merges old oil with liquid in a separate canister, and then pours fresh oil into the automatic transmission. Further, it is important to track the color when it is time to stop the installation: if the color of the incoming and outgoing liquid is the same, that is, all the old oil has merged, and fresh oil is circulating in the system.
After that, we can assume that the replacement of the oil was successful, but in order to get the maximum beneficial effect from the replacement of oil it is necessary to change the oil filter. To change it, it is also necessary, as during partial replacement - to remove the pallet, clean it and change the filter, then put the gasket and add more oil, which is usually lost when the pallet is removed. Then you can safely disconnect the installation, return all connections to the initial position, restart the engine, check the oil level with a dipstick, and if the level is normal, then you can consider the complete oil change in the automatic transmission box finished.
In general, if everything is done correctly, a full-flow oil change will take about 1 hour of work. Full-flow oil change involves additional costs for oil, which will require twice the amount of oil for the box to flush the system. But these costs are nothing when compared with the possible costs of repairing the automatic transmission.
What tools will be needed when changing the oil in the automatic transmission
LIQUI MOLY Automatic Transmission Oil Cleaner - flushing agent for automatic transmissions
Description
Liqui Moly Automatik Getriebeoil Reiniger is a professional and efficient flushing agent for automatic transmissions that can also be used for prevention. Designed for full-flow oil change in the automatic transmission box, high-quality cleans the box components from various contaminants, after such cleaning the service life of the automatic transmission increases.
In addition, if you use Liqui Moly Automatik Getriebeoil Reiniger, the original characteristics of the box will be restored, and many problems that have arisen with time will be eliminated.
The manufacturer Liqui Moly warns that this tool can only be used in service stations, which have special equipment that ensures the replacement of the entire amount of oil in the automatic box. Liqui Moly Automatik Getriebeoil Reiniger has 300 ml of liquid, which is enough for 6–9 liters of gear oil.
Recommended article: A new car up to 350,000 rubles is a rarity.LIQUI MOLY ATF Top Tec 1700 - synthetic oil for an automatic transmission
Description
The brand "Likvi Moli" is known to many motorists due to its high-quality car chemicals and motor oils. The production of lubricants is one of the main directions of the company. The company is quite popular, but it creates high-quality products that are in high demand among motorists.
As for the transmission oil Liqui Moly ATF Top Tec 1700, it is fully synthetic, and is intended for modern automatic transmissions, it consists of many additives that provide high lubrication units. In addition, this oil can be used for a long time, it does not age and does not oxidize.
The viscosity of this oil is characterized by a high index, which ensures optimal gear shifting, and also provides good protection against wear, even under extreme driving conditions.
How to apply this oil
This oil can be used in all automatic transmissions from different manufacturers. Using this oil should not contradict the specifications of the manufacturer of the engine and transmission. Also, for the most effective lubrication of the transmission, it is recommended not to mix this oil with other oils.
LIQUI MOLY Quick Cleaner - fast cleaning agent
Description
One of the most popular products from the Likvi Moli company is the fast cleaner Liqui Moly Schnell Reiniger, which is designed to greatly facilitate installation work. Schnell Reiniger quickly and easily removes various oil and grease deposits and contaminants. This tool can also be used to degrease the surface and leaves no residue.
Schnell Reiniger from LIQUI Moli perfectly copes with the remnants of resins and lubricants, because it has high penetrating characteristics. This tool is considered a universal cleaner, which can be used not only in the repair of transmission, but also with the brake system, clutch and even the engine, wherever you need to get rid of oil stains.
Applying a quick cleaner
It is very easy to work with Liqui Moly Schnell Reiniger - apply the cleaner on a dirty surface and after a while it should drain as soon as the cleaner dries, the surface of the part will become clean and degreased. It is important to know that this cleaner can easily damage some plastic parts, as well as the varnished surface, so that before using this tool you need to check whether the cleaner is compatible with the surface that needs to be cleaned.
And then the video, in which you can see how to properly change the oil in the automatic transmission in full-flow way:
