What fluids are used in automatic transmissions?
Fluid designed for automatic transmissions is called MERCON or ATF Dexron. This is followed by numbers from II to VI, with VI designed for use in the latest units. Mixing liquids is allowed here, but with a certain rule: modern fluid with the largest number can be added to an older one with a lower number. The reverse order is not allowed.
The choice of these fluids is also simplified because they do not have a viscosity designation, like motor oils. However, there are several car manufacturers that require only “their” fluids to be used in transmissions. For example, Honda recommends ATF-Z1 and Toyota recommends ATF WS.
Vehicles equipped with Jatco CVTs use NS2 or NS3 fluids. And here the numbers mean the same thing: the newer the model, the bigger the number.
What fluids are used in variators?
Automakers prohibit mixing fluids for automatic transmissions and CVTs. Each CVT manufacturer uses its own fluid..
If a leak has developed from the variator cooling system, then for a long trip it is better to have a container with liquid to refill. It is of course best to eliminate the cause of the leak before the journey. You should also check the liquid level in the device correctly. To do this, the car must be installed on a horizontal section of the road and the temperature of the variator recommended by the manufacturer must be taken into account.
What fluids are used in robot gearboxes?
Most dual clutch robot boxes have two of them different cavities. Ordinary gear oil is poured into the half with the gears. The steering cavity is filled with a special hydraulic fluid. In this case, only original fluids may be used.
As for single-link robot boxes, the working fluid requirements are the same as for mechanical boxes.
What fluids are used in manual transmissions?
For manual transmissions, GL-4 oil with a low viscosity of 75W-80 or 75W-90 is more often used. It is allowed to add oil from different manufacturers, the main thing is to take into account the viscosity index and the GL-4 index. The use of GL-5 for manual transmissions is undesirable because the additives it contains can damage synchronizers.
Distributors and gearboxes
A certain type of oil is used for transfer cases of all-wheel drive VAZ vehicles. Hover H5 requires ATF fluid. And in this case, experiments with mixing are unacceptable.
Only GL-5 oil should be used for hypoid gears.
Crossovers require a small amount of oil for the front gearbox. For example, for Renault Duster, 250 ml is sufficient.
Hypoid transmission gearboxes are equipped not only with heavy SUVs such as Land Cruiser or UAZ. A similar unit can also be used in Crete with four-wheel drive. Crossovers have two hypoid pairs. One is installed in the rear gearbox, the second in the front, near the gearbox. Here an oil with a higher viscosity than in manual transmissions and heavily loaded units should be used: 75W-140. In gearboxes, hypoid oil is added with strictly appropriate viscosity.
Power steering
Automatic transmission oil is used more often in the power steering system. If leakage occurs, you can add any ATF fluid. This protects the power steering pump from dry wear.
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