The gearbox oil is automatic and mechanical. The best gear oil

The replacement of a component such as a lubricating fluid, through which metal parts rub against each other for a longer time, is very important. Consider in the article the oil for the gearbox.

Value

What is it for? Let's look at the mechanism itself. In the gearbox there are gears that are mounted on the shafts. The latter rotate on the bearings. It is clear that through the teeth the gears come into contact, which causes friction. Particles of metal absorb oil for automatic transmission or mechanical.

However, in addition to this, the liquid is adversely affected by high pressure and slip. This has a destructive effect on the film formed on the rubbing elements. As a result, the metal jams, and the design is gradually destroyed.

Properties

To eliminate the corrosive effects of the medium, there is oil for the gearbox, which has a viscosity and has special additives. Thanks to the oil film, the sensitivity of the gearbox parts is significantly reduced.

Additives in the transmission fluid are, in essence, the same as in engine oils. They are additives that protect parts from wear and corrosion. They act in a certain way depending on the temperature and other factors. However, for lubrication in the gearbox they are added in completely different proportions than in the motor fluid.

To strengthen and reliability of the oil film, chlorine, phosphorus, sulfur and zinc are added. That is a whole lot of chemical elements. They form oxides, which, despite the high pressure and mechanical friction, contribute to the preservation of parts in the gearbox.

Types

Transmission lubricant, like motor, has three foundations.

1. Mineral water.

2. Semisynthetic.

3. Synthetic.

Let us consider in more detail the features of each of them.

Synthetics

This is the best oil for the gearbox. It has excellent fluidity. However, if the operating temperature changes are strong, the lubricant may cause leakage through the stuffing boxes. Especially it can concern car, having the big run.

The advantage of the oil lies in its density, which depends less on the low temperature during the cold period than other substrates. Such lubricants are often used as vsesezonok.

Semisynthetic

Its basis is obtained as a result of mixing synthetics and mineral water. Oil has advantages over mineral water and is cheaper than synthetics. Therefore, many motorists give preference to this species.

Mineralka

But most often still use mineral water. This is the cheapest option. To improve its performance, some additives with sulfur are added there.

The conclusion is simple: synthetics is superior in its characteristics to mineral water. However, due to its high cost is used less often.

In no case can you mix the synthetic base with the mineral itself. This process is performed under special conditions on high-tech equipment. With self mixing, the result will be the need to replace the gearbox soon.

Lubricating fluid for automatic and manual transmission

The oil for the mechanical gearbox relieves loads, lubricates rubbing elements, removes heat and formed rust.

Such gears and bearings inside require lubrication by immersion and splashing. Sometimes it is not enough, and for the oil is added a forced supply, carried out under pressure.

The automatic transmission oil (ATF) has higher quality characteristics. Here it is designed to transfer mechanical energy throughout the system. It's even more like hydraulic fluid than oil.

In addition to lubricating the gears, a fluid is created. All mechanisms work smoothly, heat is more easily removed, and corrosion protection is provided.

The viscosity index is also higher, and the lubricant is able to resist foam formation more strongly.

The oil for the robotic gearbox does not affect oil seals and elastomers so much.

Such a composition is very resistant to the oxidation process.

Sometimes this kind is used for manual transmissions. This can be done, but such a grease will cost more.

Classification by viscosity

Both in motor and transmission oil, two classifications are known:

• SAE;

• API.

The first classification divides the oils into summer, winter and all-season. The last of us are the most common.

The second - in seven groups, the most common of which are the GL-5 for moderate loads and the GL-4 for extreme driving.

Change of oil

Not all brands of cars gear oil is changing. In some expensive models, such a replacement is not provided by the manufacturer himself. Usually in new automatic boxes it is poured for the entire service life. In such machines, even a dipstick is not even provided to check the level of this lubricant.

On the following models oil change for the gearbox is not required:

• German marks after the nineties of release;

• "Chevrolet Yukon" with automatic transmission type 6L80;

• Honda CR-V of recent years and others.

However, if there is a problem in the mechanism, the gearbox oil will still need to be replaced. However, such questions, of course, are decided by specialists.

For ordinary brands, it is desirable that every eighty thousand kilometers, that is once every two years, the oil for the gearbox changes, VAZ or a foreign car. Naturally, this indicator is averaged and does not take into account various circumstances, such as traffic jams, difficult climatic conditions, the quality of roads. Therefore, speaking of the Russian conditions, they can be approximated to extreme ones. Therefore, those who care about their cars, sometimes change their fluid once in forty thousand kilometers or even more often.

But also the condition of the lubricant can be determined and visual inspection. If the liquid is dark and also smells like burning, it's not worth waiting for a measured ride from the gearbox. It is better to immediately contact the service to replace the oil.

The best oil for winter

Which gearbox oil should I choose in this case? It should be filled only what is prescribed by the manufacturer. If this is not known, they are guided by general recommendations.

So, at low temperatures, winter lubricants are used. They can be distinguished by the letter W, "winter", which means "winter". The most suitable option is the viscosity of 80W, 85W. An excellent option will be the all-weather 75W, which will not need to be changed in the warm season. Such oils almost do not change the viscosity to thirty degrees of frost. Therefore, to start the engine on a cold season with them it will be possible without problems. In addition, fuel consumption during the warm-up period decreases, because the motor is not loaded additionally, as would be the case if the gears rotate in the crankcase, if oil froze. This is especially noticeable on domestic cars. Such an all-season synthetics shows great stability not only in winter, but also in the summer.

However, before you fill the fluid in the reducer, you still need to be completely sure that it will suit the car. The matter is that for some foreign cars it is possible to use only special oil for a mechanical transmission and for automatic. It is calculated for the duration of operation. Find similar brands we have on sale is quite difficult. However, if you ignore the instruction and fill the conventional GL-4 or GL-5, then the gearbox resource can significantly decrease.

Rinse when replacing

It is believed that by changing the gearbox oil, it is advisable to flush the unit. Then the old grease particles will be cleaned. It is better for this procedure to use the same oil, which will be subsequently filled. But if it proves too expensive, then you can choose the oil for the gearbox special transformer or spindle. To ensure that no channels and drive axle are damaged, a quarter of a kilometer passes with a minimum load on the car.

Conclusion

Transmission oil for gearboxes is not cheap. The most expensive brand is "Motul" for automatic transmission. For mechanics, lubricants are cheaper.

However, the driver should be aware of all emerging innovations, as it is known that this market is very dynamic and rapidly developing, which means that new products are constantly emerging, tearing away new opportunities and improving the condition of the car's parts.