- one of the most common and mandatory jobs in the maintenance of any car. At the same time, having studied the instructions well, it is quite possible to cope on your own and save on car service services. To do this, we will consider in detail which oil is best to pour when replacing a Chevrolet Niva not only in the box, but also in the distributor, as well as bridges.
How to choose oil for a box, transfer case and bridges Chevrolet Niva.
Transmission oil tolerances on Chevrolet Niva
An important aspect when choosing a lubricant is viscosity. Based on this parameter, it is determined under what temperature conditions the car will operate. In practice, most car owners fill in oils with a viscosity of 10 - 40 for the Chevrolet Niva engine, both in summer and in winter. If you adhere to the principle of changing the oil according to the season, then:
- with the onset of cold weather, fill in 5 - 40;
- in the warm season, use grease 10 - 40.
Some pour completely liquid oils 0 - 40, but they are much more expensive, and they will not give much of a fundamental difference. If the car engine does not have hydraulic lifters, you can use 10 - 40 regardless of the season, and in the case of hydraulic lifters, fill in 5 - 40.
It is important to remember that it is absolutely impossible to add lubricants of the most common API GL-5 standard to the Niva Chevrolet gearbox. On the one hand, in terms of performance, it is better: it shows itself well at high speeds, high loads and temperatures. On the other hand, it contains sulfur-phosphorus extreme pressure additives, which in high concentration can disrupt the operation of the synchronizers of the Niva manual transmission. Transmission fluids of GL-5 standard are recommended by most motorists to be used as an additive in axles and gearboxes.
The razdatka and gearbox should be in compliance with API GL4 or GL4 / GL5 quality standards and SAE viscosity 75W-90, 80W-85, 80W-90. For gearboxes, front and rear axles, transmission fluid is designed according to API GL5 or GL4 / GL5. It is better not to use oil with GL4 standard.
What kind of oil to fill in the checkpoint
Time-tested and widely used brands lubricating fluids for the Niva Chevrolet gearbox:
Of course, there are other brands of manufacturers of lubricating fluids, but it is the presented brands that should be trusted. The manufacturer recommends changing the lubricant every 45 thousand kilometers. But it all depends on the conditions and activity of the operation.
Selection of oil for dispensing
In order to choose the right lubricant for transfer case there are several factors to consider. One of the most important is compatibility with other fluids used. Be sure to check the correct viscosity of the grease before purchasing. At the same time, it is not at all necessary to purchase products from one manufacturer. It is also not recommended to use lubricants of different chemical composition so that they do not mix. This is very important if you want to truly improve the performance of your vehicle. Therefore, if you pour semisynthetics into a Chevrolet Niva, then in the case of a transfer case, purchase a semisynthetic lubricant.
What to choose for bridges
In most cases, the oil for the axles is chosen the same as for the transfer case. Their full compliance guarantees you high functionality of all components of the transmission during the active daily operation of the car. Most motorists are unanimous in the opinion that only proven lubricants are worth buying. These include the products of such brands:
- Castrol;
- Lukoil;
- Liqui Moly;
- Mobil;
- Shell;
This is a list of the most popular and widely used brands. Their products are used by a huge number of motorists with different experience. When buying, be sure to check the compatibility of the viscosity and chemical composition with the oil already used in the gearbox.
Outcomes
In most cases, the Niva is used for off-road driving, and this is a heavy load on the transmission. Therefore, it is optimal to change the oil after a run of 15 - 20 thousand kilometers. Do not save where it is fraught with bad consequences. By implementing Maintenance car, assess the condition of all engine components, and change filters and candles at least once every two oil changes.
Each vehicle mechanism, in which there are rubbing parts (including the transfer case), need (and, accordingly, its regular replacement for trouble-free movement).
Note that both the device and the method of operation of the "handout" can differ significantly among themselves, therefore, to the choice lubricant it is necessary to approach very carefully, preferably having previously studied the scheme of the transfer case of your car.
In this article, we will consider what oils are and to which transfer cases they are suitable for changing speeds.
The transmission oil must be changed every one hundred thousand kilometers of the vehicle's mileage.
Important! The resource largely depends on the operating conditions. If you often move in dusty areas and off-road, then you need to replace it more often (once every 4 months). Also take a note, if you overcame a ford where the water level was higher than the breathers, then you need to change the oil as quickly as possible.
Electronic "dispensers" need to change the lubricant every 70 thousand kilometers.
Note that frequent off-road driving, slipping and other "obstacles" to normal movement, negatively affect the level of oil oxidation, and also lead to wear of the friction discs.
How to choose
Today there are two types lubricating oils for "dispensing": ATF liquid and transmission oil into the transfer case. As a rule, in those vehicles on which it is installed, you need to fill in - the transmission, and in those where there is an automatic transmission - ATF.
Note that for modern Vehicle, manufacturers recommend pouring gear oils of the GL-5 class. They do an excellent job of protecting hypoid gears, and also do a good job while moving around (because they have shockproof additives in their composition).
Also, its viscosity plays an important role in the choice of lubricant for handouts. Take, for example, the value "80W90":
- W - this means that the material is all-season;
- 80 - values of the level of viscosity at low temperature conditions;
- 90 - viscosity at high temperatures.
If ATF fluid is suitable for your car, then it is recommended to buy original materials recommended by the manufacturer. In an extreme case, an analog is suitable, which has all the necessary tolerances in its composition.
What kind of oil and how much to fill
Transmission lubricants should be divided into several qualifications, namely:
- SAE J306 - viscosity grade. This indicator speaks of viscosity (namely, how it will react to severe frosts or heat). It is worth saying that lubricants under a similar designation are all-season.
- API GL - this indicator states the separation of transfer case lubricants by quality. The indicators differ among themselves by the level of performance, the level of antifoam, antioxidant, and antiwear additives. API oils GL 3 is suitable for all-wheel drive vehicles. API GL 4 - perfectly compatible with transfer cases installed on the following TZ UAZ, NIVA, Opel frontera, Mitsubishi Pajero II, Toyota Land Cruiser 90. API GL 5 are considered to be the leaders in quality - they are the best suited for the newest specifications.
How to choose
The transmission oil for the transfer case of your vehicle should be selected based on the climatic conditions where the car is operated. If in your region the air temperature often drops more - 30 degrees Celsius, then it is recommended to turn your attention to 70-75W greases (the latter indicator is suitable for very severe frosts).
For regions with a temperate climate, grease with the designation 80W is suitable. If you are constantly in a region where high temperatures are pleasing, then turn your attention to 75W90 grease.
Well, now you know what kind of oil you need to select and what it is. We have done our best and also conducted our own investigations in order to determine for various vehicles.
For the future, we wish you to be as careful as possible and, having certain knowledge, trust only yourself, and not the sellers (who, as a rule, are distinguished by their verbosity and the gift of persuading people). Trust only yourself!
We really hope that this article was useful for you and allowed you to draw certain conclusions. We wish you happy shopping and happy travel!
Since the distribution box contains rubbing elements, wear products inevitably appear in it over time. If you do not change the oil in the transfer case in a timely manner, its resource will be reduced. Oil loses performance and small particles increase gear wear.
How often to change
There are several different types of transfer cases, and depending on the type of mechanism, the frequency of replacement can vary significantly. Usually this information is contained in the technical documentation for the car and varies in the range from 50 to 100 thousand kilometers.
In addition, the operating conditions affect the period. The distribution of a car that drives on public roads experiences much less stress than that installed on a car that is constantly moving off-road.
How to choose
Two types of fluid are poured into the razdatka: transmission oil or ATF fluid. On cars with automatic transmission, ATF is usually poured into the transfer case, with manual transmission - the transmission. In this case, often, the fluids must match, or be completely compatible.
This is due to the fact that usually the connection between the transfer case and the box is made by a single shaft, or one is attached to the body of the other. When mixing liquids, this will avoid the formation of emulsion, foaming and other side effects.
For most modern cars with a dispenser, the manufacturer recommends the use of gear oils of the GL-5 class. They protect hypoid gears well, are designed to work in the most loaded mechanisms and contain extreme pressure additives.
Not the least role is played by the viscosity characteristics of oils. Let's analyze the meaning of the numbers using the example of 80W90 oil:
- 80 - viscosity at low temperatures
- W - all-season
- 90 - viscosity at high temperatures
If ATF is used, it is better to fill in the original fluid recommended by the manufacturer, or an analogue with appropriate approvals. 
What and how much to fill
The following table will allow you to choose oil by car brand and find out how much is required.
| Automobile | Butter | Volume (L) |
|---|---|---|
| AUDI | ||
| audi q7 (audi q7) | G052162A2, 4014835712317 Ravenol ATF 5/4 HP | 0,85 |
| Bmw | ||
| bmw x5 e53 (bmw x5 e53) | BMW 83 22 9 407 858 "ATF D-III, ATC-500 83220397244 | 1 |
| bmw x5 e70 (bmw x5 e70) | 83 22 0 397 244, Multi DCTF, Motylgear 75W80 | 1 |
| bmw x3 e83 (bmw x3 e83) | 83229407858 | 1 |
| bmw x3 f25 (bmw x3 f25) | BMW Verteilergetriebe 4WD TF 0870 (83 22 0 397 244) | 0,6 |
| GAS | ||
| gas 66 | TAP-15V, TSp-15K, TSp-Mgip, 80W90 Gl-4 | 1,5 |
| GREAT WALL | ||
| Great wall hover | Dexron III | 1,6 |
| JEEP | ||
| Jeep Grand Cherokee ( Jeep grand Cherokee) | Mopar 05016796AC | 2 |
| INFINITI | ||
| Infiniti fx35 (Infiniti fx35) | Nissan Matic D - KE908-99931 | 2 |
| KAMAZ | ||
| kamaz 43118 | TSp-15K | 5,4 |
| KIA | ||
| kia sorento | Dexron II, III (IDEMITSU Multi ATF, GT ATF TYPE Multi Vehicle IV) | 2 |
| kia sorento 2 | Castrol Syntrax Universal Plus 75W90, RAVENOL TGO 75W90 | 0,6 |
| kia sportage 1 ( kia sportage 1) | API GL-5 SAE 75W-90 | 1 |
| kia sportage 2 | 75W90 GL-5 (Mobil Mobilube HD 75W90 GL-5, Castrol 4008177071768 "Syntrax Longlife 75W-90) | 0,8 |
| kia sportage 3 | HYPOID GEAR OIL API GL-5, SAE 75W / 90 | 0,6 |
| kia sorento TOD | Shell Spirax S4 ATF HDX, MOBIL ATF LT 71141 | 2 |
| kia sorento Part-Time | ATF Dexron III | 2 |
| RANGE ROVER | ||
| land rover discovery 3 (range rover Discovery 3) | SAF-XO 75W-90, Syntrax Longlife 75W-90 | 1,5 |
| Land Rover Discovery 4 | Tl7300-Shell Tf0753 | |
| land rover freelander 2 (range rover freelander 2) | API GL5, SAE 90 | |
| Land Rover Defender ( Land rover Defender) | 75W-140 GL-5 | 2,3 |
| LEXUS | ||
| Lexus rx300 / 330 (Lexus rx300 / 330) | 85W-90, CASTROL TAF-X 75W-90 | 1 |
| MERCEDES | ||
| Mercedes GLK (Mercedes-Benz GLK-Class) | handout box | |
| Mercedes ml 163 (mercedes ml 163) | 236.13 # A001989230310, Motul Multi ATF | 2 |
| Mercedes w163 (Mercedes-Benz w163) | A 001 989 21 03 10 | 1,5 |
| Mercedes w164 (Mercedes-Benz w164) | A0019894503 | 0,5 |
| MAZDA | ||
| mazda cx 5 (mazda cx 5) | GL-5 80W-90, MOBIL Mobilube HD 80w-90 GL-5 | 0,5 |
| mazda cx 7 (mazda cx 7) | 80W90 API GL-4 / GL-5 | 2 |
| MITSUBISHI | ||
| mitsubishi pajero sport ( mitsubishi pajero sport) | Castrol TAF-X 75W-90 | 3 |
| Mitsubishi Outlander 3, hl ( mitsubishi outlander 3, xl) | 80W90 Gl-5, 75W90 GL-5 | 0,5 |
| mitsubishi l200 (mitsubishi l200) | GL-3 75W-85, GL-4 75W-85 | 2,5 |
| mitsubishi pajero 2 | 75W85 GL4 | 2,8 |
| mitsubishi pajero 3 | GL-5 80W-90, Castrol Syntrans Transaxle 75W-90 | 3 |
| mitsubishi pajero 4 | ENEOS GEAR GL-5 75W-90 | 2,8 |
| Mitsubishi Montero Sport | Castrol TAF-X 75W-90 | 3 |
| Mitsubishi Delica | 75W90 Gl-4 | 1,6 |
| NIVA | ||
| niva 2121/21213/21214 (vaz 2121/21213/21214) | Lukoil TM-5 (75W-90, 80W-90, 85W-90), TNK Trans Gipoid (80W-90), Shell Transaxle Oil (75W-90) | 0,8 |
| Nissan | ||
| nissan x trail t31 (nissan x trail t31) | Nissan Differential Fluid (KE907-99932), Castrol Syntrax universal plus 75w90 GL-4 / GL-5 | 0,35 |
| Nissan Qashqai | NISSAN Diffirential Fluid SAE 80W-90 API GL-5 | 0,4 |
| Nissan Pathfinder r51 (Nissan Pathfinder r51) | Nissan Matic-D, Dexron III | 2,6 |
| Nissan Terrano | SAE75W90 GL-4, GL-5 | 2 |
| Nissan Teana | GL-5 80W90 | 0,38 |
| nissan murano z51 ( Nissan murano z51) | Genuine NISSAN Differential Oil Hypoid SuperGL-5 80W-90 | 0,3 |
| OPEL | ||
| opel antara | GL-5 75W90 | 0,8 |
| Opel Mokka | GM 93165693, MOBILUBE 1 SHC 75W-90, Motul GEAR 300 75W-90 | 1 |
| PORSCHE | ||
| Porsche cayenne ( porsche Cayenne) Hang-on | Shell TF0870, RAVENOL Transfer Fluid TF-0870 | 0,9 |
| Porsche Cayenne Torsen | Castrol BOT 850, Burmah BOT 850 | 0,9 |
| RENAULT | ||
| Renault Duster 2.0 4x4 ( renault duster 2.0 4x4) | Elf TransElf Type B 80W90 | 0,75 |
| renault koleos | Elf TransElf Type B 80W-90, Total Transmission rs fe 80w-90 | 1,5 |
| SUZUKI | ||
| Suzuki Escudo | SAE 75W-90, 80W-90 API GL-4 | 1,7 |
| suzuki grand vitara | 75W-90 API GL-4, SAE 80W-90 API GL-5 | 1,6 |
| Suzuki CX4 | TAF-X | 0,6 |
| SSANGYONG | ||
| SsangYong Kyron ( SsangYong Kyron) Automatic transmission | Dexron IID, III | 1,3 |
| SsangYong Kyron manual transmission | 80W90 API GL-4 / GL-5 | 1,4 |
| SUBARU | ||
| subaru forester | no transfer case, downshift in the box | |
| TOYOTA | ||
| Toyota Hilux | API GL3 75W-90 | 1 |
| Toyota Land Cruiser Prado 120/150/200 (Toyota Land cruiser prado 120/150/200) | GL-5 75W90 Toyota Gear oil | 1,4 |
| toyota rav 4 | Toyota Synthetic Gear Oil API GL4 / GL5, SAE 75W-90 | |
| Toyota Highlander | LT 75W-85 GL-5 TOYOTA | 0,5 |
| UAZ | ||
| UAZ Patriot | SAE 75W / 90 according to API GL-3, TSp-15K, TAP-15V, TAD-17I | 0,7 |
| uaz 469 | TAD-17, 80W90 Gl-5, 85W90 GL-5 | 0,7 |
| uaz hunter | SAE 75W / 90 as per API GL-3 | 0,7 |
| URAL | ||
| ural 4320 | TSp-15K | 3,5 |
| FORD | ||
| Ford Explorer 2013 | Motul 75w140 | 0,4 |
| ford kuga ( ford kuga) | SAE 75W-90 | 0,5 |
| ford kuga 2 | SAE 75W140 | 0,4 |
| Ford Maverick | SAE 75W140 | 2 |
| Ford Explorer 5 | SAE 75W140 (Castrol Syntrax Limited Slip 75w140) | 0,4 |
| VOLKSWAGEN | ||
| Volkswagen amarok | G052533A2, Castrol Transmax Z | 1,25 |
| Volkswagen touareg | VAG G052515A2, Castrol Transmax Z | 0,85 |
| Volkswagen tiguan | G 052 145 S2 | 1 |
| HYUNDAI | ||
| Hyundai ix35 (Hyundai ix35) | 75W90 | 1 |
| Hyundai santa fe 2.7 ( Hyundai santa Fe 2.7) | Shell Spirax AXME 75W90 | 1 |
| Hyundai Tucson | 80W90 GL-4 / Gl-5 (Shell Spirax S3 AX 80W-90), 75W90 GL-5 (Castrol Syntrax Universal 75W-90) | 0,8 |
| HONDA | ||
| Honda SRV (Honda CR-V) | the transfer case is combined with the gearbox | |
| CHEVROLET | ||
| Chevrolet niva | 80W-90 GL-4, 75W-90 | 0,8 |
| Chevrolet Captiva | GL-5 75W90 | 0,8 |
| Chevrolet Tahoe | Dexron VI (GM Dexron 6, Spirax S3 ATF MD3, Chevron ATF MD3, AC Delco auto trak II) | 2 |
| Chevrolet TrailBlazer | GM Auto-Trak II | 2 |
Check level
On most cars, viewing windows are not provided for checking the oil level in the dispenser. Level control and replacement is carried out through the filler hole.
To check, it is necessary to place the car on a flat surface and unscrew the filler bolt, or the control bolt, if any. Usually they are made for four or hexagon, or for a wrench. 
A level just below the filler / control hole is considered normal.
The need for replacement is determined by the intake of a small amount of oil. This can be done with a syringe with a flexible tube at the end. Black, cloudy, with traces of depletion, must be replaced.
How to change
The replacement procedure itself is simple, but often complicated by the fact that access to the filler hole is difficult. A lift, viewing pit or overpass is also required.
Some motorists make their own drain hole in the dispenser to make the procedure as easy as possible. complete replacement oils. To do this, a hole is drilled at the bottom point for the plug and a thread is cut.
You will need:
- A special syringe for pumping technical fluids (cost 500-800 rubles). You can use a medical one, but due to its small volume, the replacement process will be significantly delayed. What is more expensive - time or money, you decide.
- Transfer oil (transmission / ATF) recommended by the manufacturer or having an appropriate specification.
- Gasket sealant, degreasing liquid.
To prevent dirt from getting inside the dispenser, clean the surfaces before unscrewing the plugs.
There is a drain hole
If your car is equipped with a drain plug, you need to unscrew the bolt and wait until the oil drains out completely. The magnet on the plug should be cleaned of wear debris. Degrease the drain hole and plug, apply a coat of sealant and screw the plug back in place.
Using a syringe, fill the dispenser with oil until it flows over the edge of the filler hole, and then screw the plug onto the sealant.
No drain
In this case, all operations are performed through the filler hole. A syringe tube is inserted into it and the oil is pumped out as much as possible. The procedure for adding new oil is the same as described above.
The transfer case, like any mechanism in the design of which there are rubbing pairs, requires periodic oil changes. Since they can vary significantly, you should carefully approach the choice transmission fluid... Consider how to change the oil in the handout box with your own hands.
Classification of oils
The main types of classification of gear oils:
Some manufacturers, along with API GL and SAE J306, indicate the MIL specification, which only shows the compliance of oils with the requirements of the US Military.
How to choose the oil
The transmission should be selected according to the climatic conditions in which the vehicle is used. If in the region of operation the temperature often drops below -30 ° C, then oils with a low-temperature indicator of 70W are recommended (75W is also acceptable, but in especially severe frosts the oil will be too thick before warming up). In areas where the specified temperature barrier is unattainable, 75W should be used. For regions with a temperate climate, 80W is also suitable. As for the high-temperature index according to SAE, for civilian SUVs and passenger cars the values: 80.90 are quite suitable (for example, 75W90).
If you want to change the handout oil with your own hands, then information on the required tolerances, specifications, filling volume can be found in the manual for the repair and operation of your car model (or similar machines on which the same type of transfer case is installed).
Influence of the arrangement of transmission units
The type of transmission fluid will depend not only on the design of the transfer case, but also on the engine-transmission connection. In fully mechanical transfer cases, in which the principle of operation is reduced to moving the sliding clutches and changing the combination of rotating gears, a simple gear oil is used - API GL 4/5. It is also poured into manual transmissions, drive axle differentials. But if the same archaic type of transfer case is paired with an automatic transmission, then instead of the usual oil, transmission fluid should be used for automatic boxes gears - ATF.
Please note that doing the opposite - pouring an automatic transmission into the box when replacing it is strictly prohibited!
This requirement is due to the fact that the gearbox and the transfer case have a common shaft, through which the torque is transmitted from the gearbox to the driving axles of the car. So that in case of wear of the stuffing box, mixing does not lead to foaming, thickening or the formation of an emulsion, in case of replacement, it is recommended to use the same class of technical fluids in both units. The same requirement is put forward for cars with manual transmission, where the transfer case is attached directly to the gearbox housing.
In which handouts is it mandatory to use ATF
The use of ATF is mandatory in transfer cases, the device of which involves blocking center differential or connecting one of the leading drives with clutch packs. In TOD (Torque-on-demand) dispensers, Haldex couplings, oil performs not only a lubricating and cooling function, but is also used as a working fluid.
Every manufacturer of newfangled transfer cases recommends the original ATF. If you buy an analogue, it is important that the product meets the manufacturer's tolerances. The generally recognized classification of transmission fluids is called Dexron. In the absence of original products, the oil in the transfer case can be replaced with Dexron IV Service Fill, Dexron V or Dexron VI, but it is imperative to adhere to the manufacturer's recommendations for tolerances and specifications. 
Replacement terms
It is necessary to change the oil in the mechanical transfer case approximately once every 100 thousand kilometers. It should be borne in mind that the resource strongly depends on the operating conditions. If the vehicle is frequently used under conditions heavy off-road, dusty roads, it is advisable to reduce the replacement time by 1/3. Comparable resource and gearbox transmission rear axle.
Please note that the oil must be changed if you overcame a ford, the water level in which is higher than the location of the transfer case breather.
For electronic handouts, the average replacement frequency is 60-70 thousand km. Also, the operating conditions affect the service intervals for the transfer case with an electro-hydraulic blocking drive. Frequent sliding, overcoming off-road conditions accelerate oil oxidation, contamination of friction discs with wear products.
Simple verification method
Visual control of the consistency, the presence of an emulsion can be assessed by unscrewing the filler plug. Use a syringe with a suitable tube to draw out a small amount of old oil from the dispenser.
- The oil change in the distributor must be carried out within 10-15 minutes after the trip, the duration of at least 5-10 km. During operation, the oil heats up and becomes thinner, which makes it better drained.
- On most cars, the drain and filler holes are made to fit a "square", therefore, to unscrew, you only need a ratchet or a knob of the appropriate dimension. Of course, this is provided that the bottom is not covered with a boot, which will need to be dismantled before replacement.
- The accompanying tool will most likely require a hydraulic syringe for technical fluids. In some cars, the use of containers with a "spout" allows you to replace without a syringe.
- On most transfer cases, it is normal for the level to be slightly below (5-10 mm) the filler hole. You can determine the actual amount of oil poured in with your finger or with a piece of bent wire. To speed up the process self replacement, you can fill in oil until it flows out of the hole for level control - this will not harm the transfer case or the rear axle in any way.
Self-replacement guide
Instructions for replacing the hand-out oil on the VAZ - 2121 "Niva" with your own hands.
In the video you can see how easy it is to change the oil in the transfer case both on the VAZ 2121 (2131, 4x4) and on the VW Touareg.
The transfer case, like any unit with friction pairs, needs periodic replacement of the lubricant. Due to the fact that the device and principle of operation of this unit may differ depending on the model, the oil in the distributor should be chosen especially carefully.
What is a transfer case?
Transfer case - integral part four-wheel drive vehicle... It is designed to distribute torque along the axles of the vehicle, as well as to increase torque when driving off-road and bad roads.
Depending on which system all-wheel drive installed on a car, the design of the transfer case differs. However, each of them has common elements:
- Front and rear axle drive shafts
- Chain / gear and reduction gears
- Center differential with locking mechanism
- Drive shaft
The drive shaft is used to transmit torque from the gearbox to the transfer case. The center differential distributes the torque between the axles and allows them to rotate at different angular speeds. Such a knot can be symmetrical (distributes the moment equally) and asymmetric (distribute in a certain ratio).
In cars where four-wheel drive is connected automatically or manually, the center differential, as a rule, is not installed.
Fully realizing all-wheel drive capabilities allows the center differential lock. It means partial or complete disengagement of the differential, which provides a rigid connection between the front and rear axles. Blocking can be carried out either manually or automatically.
Manual shutdown is performed using a hydraulic, mechanical, electrical or pneumatic actuator. Today, a viscous clutch (viscous coupling), a Torsen self-locking differential and a multi-plate friction clutch are used as automatic locking mechanisms. There are designs where both of these options are provided.
The chain drive consists of a drive and driven sprocket, as well as a chain. It serves to transfer torque from the rear axle to the front. Instead of a chain drive, a spur gear can also be used in the transfer case. A bevel gearbox is usually installed if the AWD system is connected automatically.
A crawler gear increases torque when driving off-road and rough roads. It is installed on separate structures of off-road vehicle handouts. Modern vehicles are equipped with a planetary gearbox.
When do you need to change the oil in the dispenser?
Not all car owners know, but the axles and transfer case need periodic lubricant updates. During operation, the oil becomes contaminated with mechanical wear products, which over time leads to abrasive abrasion of surfaces and failure of the dispenser.
By periodically checking the condition of the lubricant, it is possible to accurately determine in what condition it is and whether it needs to be replaced with a more recent material. Also, with a normal visual inspection, oil leaks can be detected.
The oil change in the transfer case must be carried out strictly according to the regulations established by the manufacturer. Usually it is about 20-40 thousand kilometers. With regular checking and changing the lubricant, the dispenser can last for a long time.
Some automakers claim that the transfer case is filled with oil for life. This statement is true only if you plan to hand over the vehicle to scrap and buy a new one in 3-5 years. Therefore, even in such cars, the oil should be changed, otherwise you can end up with expensive repairs or even more expensive replacement of the transfer case.
How to check the oil level in the transfer case?
To check the level and condition of the oil for the transfer case, there are no inspection windows, therefore, control and replacement can only be carried out through the filler hole.
Before checking the car, it is necessary to put the car on a flat surface and dismantle the filler, or, if available, the control bolt. Usually they are unscrewed with four or hex wrenches, or ordinary wrenches.
The normal oil level is just below the inspection or filler hole. The need for replacement is determined visually. To do this, draw a small amount of oil with a syringe with a flexible tube. If the oil is cloudy, black and contains traces of depletion, it should be replaced.
How to choose the oil?
Transmission oil is poured into the transfer case. It is selected based on the climatic conditions in which the car is operated.
There are two main classifications for these fluids: SAE J306 and API GL.
SAE J306 is a classification of lubricants for drive axles, transfer cases and mechanical boxes gear viscosity. It shows the dependence of oil viscosity on temperature changes. Thanks to modern production technologies, you can safely use all-season oils. If the letter W is present in the name of the liquid, this means that it is all-season. The most common oils are 75W-90, 80W-90, 75W-85. The first number indicates the viscosity at low temperature, and the second at high temperature.
API GL classification divides oils into quality classes, which depends on the main performance properties of the formulations. These classes are determined by how antifoam, antiwear, antioxidant, and corrosion inhibitor work. The minimum class of fluids that can be used in transfer cases is API GL-3. API GL-4 oils are suitable for distributors of most foreign cars and all domestic cars... API GL-5 fluids are designed for hypoid gears, drive axles and transfer cases of modern passenger vehicles.
If in winter the temperature drops below -30 ° C, it is recommended to use 70W oils. Liquids with a low temperature rating of 75W can also be poured, but at very low temperatures it will be too thick. In temperate latitudes, 75W and 80W oils can be filled. Considering the high-temperature indicator, oils 80 and 90 are suitable for civilian SUVs and cars, for example 75W-90.
The process of changing the oil in the distributor
Changing the oil in the distributor is not a complicated procedure. Nevertheless, it requires accuracy. Let's consider this procedure using a car as an example. Suzuki grand Vitara.
First, you need to find a flyover or pit. So you can easily get to the box casing, which is located almost in the middle of the vehicle.
Then you need to warm up the car to operating temperatures, and then drown it. Using a hex wrench, unscrew the drain plug of the transfer case oil sump and drain the waste liquid into a prepared container.
Once the oil has drained, the plug can be screwed back. But before that, it is recommended to coat it with a sealant to eliminate the likelihood of leakage. Tighten the cover tightly, but do not use excessive force, as the threads can be ripped off.
Next, unscrew the filler plug and pour the required amount of transmission fluid through the hole. The Suzuki crossover will require 1.6 liters of oil. Motul Gear 300 SAE 75W-90 is recommended here. It is convenient to fill in oil using a filling syringe. Then filler plug coated with sealant and installed in a regular place.
That's all. This completes the procedure for changing the oil in the transfer case.
Remember that the given scheme for changing the oil in the transfer case is not universal. For different cars this process may vary.
