The oil level must be checked. In addition, the lubricant must be changed in accordance with the recommendations of the automaker, as well as taking into account the current operating conditions of the machine.
When is a rear axle oil change required?
If, during acceleration of the car, uncharacteristic sounds appear in the area of \u200b\u200bthe rear axle (usually a dull hum), then it is necessary to change the oil in the axle. This symptom can be detected not only after 60-75 thousand kilometers, when there is usually a need to change the lubricant, but much earlier. In the latter case, dull sounds during the operation of the bridge may be associated with the use of dubious non-original oil. To eliminate the consequences of prolonged use of low-quality fakes, it is necessary to partially disassemble the bridge, drain the lubricant, and then thoroughly rinse its parts. After that, the rear axle oil is changed.If during the repair of the bridge it was necessary to drain the lubricant, then at the end of the work and troubleshooting, the oil in the bridge is always replaced. Replacing the bridge with a new one is also associated with the need to fill in fresh oil. Timely change of lubricant slows down the natural wear of the unit and makes its operation smoother. The oil must be changed periodically, and the experience of drivers shows that the deadlines set by manufacturers when driving on domestic roads turn out to be clearly overestimated. That is why oil changes should be done more often than indicated in the instructions. Usually the lubricant is changed after 2-3 thousand kilometers in new car, and then every 50-60 thousand kilometers.
Standard sequence of actions when changing axle oil
To change the rear axle oil, you should fix the car with stops, clean the area where the drain plug is located from the layers of dirt, and then unscrew it. Next, you need to wait until the grease, unsuitable for further use, has completely drained into the container prepared for this. After that, the drain plug is installed in its original place.At the next stage, the cover on which the oil filler hole is located is cleaned, then the corresponding plug is removed. Only now you can pour in fresh oil, while it is important to monitor its level. Required volume auto axle lubrication is 1.5-1.8 liters (depending on the model). After that, the oil filler plug is tightly tightened.
Terms of changing gear oils
from "Gear and transmission oils"
When lubricating enclosed gears, it is best to fill the required amount of oil of the appropriate quality into a hermetically sealed gearbox housing. With this method of lubrication, the oil can not be changed during the entire life of the mechanism. In particular, car manufacturers have taken this path - in their manuals they do not indicate the exact timing for changing gear oils, limiting themselves to a general recommendation on the maximum duration of their use.Therefore, to ensure reliable operation of the machines, as well as for economic reasons, it is necessary to drain the used gear oil from the gear housings and replace it with fresh one. The oil must be changed when it is oxidized or contaminated, or at regular intervals.
Studying the issues of changing the oil in gearboxes, Forbes et al. found that the operation of the gearbox in the first month of operation determines its service life in the future, they suggested replacing or carefully filtering the gear oil two weeks after putting the mechanism into operation. This is also necessary because the smallest metal particles formed during the running-in process catalyze the oxidation of the oil.
Rejecting arbitrary timing of oil changes, the authors mentioned above believe that it is most rational to periodically take oil samples to establish its further performance. First of all, these samples determine the presence of dirt, wear products and water. Oil acid number, viscosity and surface tension can also be determined. In some fleets operating trucks increased load capacity, the oil working in gearboxes and drive axles is replaced with fresh oil after its viscosity has increased by 50%.
If gear reducers are equipped with circulating lubrication systems, then, according to Forbes et al., the oil can work for several years without changing, especially if there are appropriate filters in the lubrication system. It should be noted that cleaning the circulating lubrication system during an oil change is a more laborious operation than with splash lubrication. By adding special additives to flush oils or using solvents, most deposits can be removed from the oil reservoir, oil lines and crankcase. However, after such washing, it is necessary to clean the parts of the gearbox with a dry rag.
After processing the gear housing flushing oil look at its details. If signs of rust are found on the surface of gears and other parts, you should find out the reasons for their appearance. If the gearbox parts are in satisfactory condition, fresh oil should be poured into the crankcase as soon as possible. In gearboxes with circulating lubrication systems, this can be done with the gearbox not running. In dip lubricated gearboxes, the gears are lubricated with oil prior to operation.
If the gear pair is made of dissimilar metals (for example, in worm gears), it is especially important to change the oil in a timely manner and inspect the mechanisms. After running in, bronze particles stick to the worm and make its surface rough, which increases the wear of the worm wheel. By replacing the used oil and removing bronze from the worm shortly after starting a new gearbox, further gear wear can be prevented.
With a single use lubricating oil flushing the mechanism may not be necessary. When lubricating with oil mist, only fresh oil is supplied to the gearbox and the hermetically sealed gearbox housing is kept under a certain pressure, which eliminates the possibility of contaminants entering the lubrication system. When operating open gear reducers, it is advisable to clean them periodically. In such gears, not only residual oils are contaminated with various mechanical impurities that act as abrasives, but the cavities between the gear teeth become clogged with heavier oil components. If this continues long enough, misalignment of the shafts may occur. These deposits can be removed by flushing the gearbox with kerosene or some other solvent and being careful. If there are oil sumps in open gearboxes, they must also be cleaned at regular intervals.
Why pour m How about in the rear axle gearbox? Timely filling of oil liquid into the rear axle gearbox is necessary in order to improve the interaction of the parts of the unit, to extend their operational period. Usually, automotive components break down due to wear and tear, poor maintenance.
Prevention of malfunctions makes it possible to prevent the occurrence of various malfunctions in the unit. You need to understand how the oil is changed in the razdatka and rear gear, be able to choose which oil to pour into the rear axle gearbox.
How does the rear axle work, why does it wear out?
The rear axle gearbox (transfer box) is a united with each other nodes that transmit torque from power unit to the wheels. The gearbox is subjected to different loads, the degree of which depends on the number of revolutions. In view of this, friction appears in him, which has a destructive effect on his condition. In order to compensate for this effect, a special lubricant is used to soften the movement of moving parts and ensure their integrity. Change gearbox oil important procedure, which cannot be neglected.
Change oil in rear axle need about once every thirty-five thousand kilometers. This replacement frequency is recommended by well-known car manufacturers. There are certain signs, upon detection of which it is necessary to immediately replace the consumable (having previously determined which oil to pour into the rear axle gearbox). They include:
- reduction in the amount of oil;
- the appearance of gray dust in the lubricant;
- change the shade of the consumable.
The influence of harmful factors on the rear axle of the machine
A decrease in the amount of lubricant may be due to a deterioration in its technical characteristics, leading to a change in the viscosity index. Also, the level of the consumable may decrease due to normal leaks that occur due to increased loads.
The appearance of gray dust is a sign of worn parts. The outer layer of spare parts is erased over time, precipitates. Once in the oil, the sediment begins to circulate throughout the lubrication complex. If it is on an important part, its holes may be partially clogged. This may lead to breakage. Pour fresh grease into the gearbox if this problem is identified, it is necessary immediately. If you find metal particles, shavings in the car oil, then you need to overhaul the engine and completely replace damaged parts.
A change in the shade of an oil product from gold to black is considered a sign that the lubricant is functionally worn out. Prolonged use, high loads, dustiness - all this gradually leads to a deterioration in the performance of the oil. The molecular structure of the oil product is broken. Such oil is unable to lubricate parts with high quality.
If you find at least one of the above signs, replace the oil immediately. You can use the services of a car service. Its employees will replace the oil in the transfer case in a short time. You will only need to pay them for their work. If you change the oil product yourself, you can save a lot (provided that the replacement is carried out correctly). However, when changing the lubricant, it is difficult to make such a mistake that could completely bring vehicle out of service. The most dangerous thing that can happen is that you get burnt oily liquid. If you are careful, this will not happen. You can save your money if you know how to fill the rear axle with oil.
Algorithm for changing the oil in the rear axle gearbox
How is the oil changed in the rear axle gearbox? The algorithm is:
Now you know how to change the oil in the rear axle of a VAZ (and any other car). Changing the oil in the rear gearbox is a fairly simple procedure.
What car oil to choose?
What kind of oil to fill? It is possible to use both mineral water and synthetics. Due to its composition, synthetics resist wear better than mineral water made through petroleum refining, which must be changed frequently. plus mineral oil it is considered to be quite a small price. Special additives are added to synthetics, which increase the operating period of such an oil by several times. However, the cost of synthetic consumables, especially from well-known manufacturers, is quite high.
Before deciding which oil to pour into the rear axle gearbox, remember that there are also semi-synthetic petroleum products. They are not as expensive as synthetic ones, while they have quite high technical specifications(constant viscosity index, excellent lubrication performance). No wonder semi-synthetics has become so popular among many car owners in the Russian Federation.
Since the razdatka 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 is reduced. Oil loses performance and fine 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 in them can vary significantly. This information is usually found in technical documentation to the car and varies in the range from 50 to 100 thousand kilometers.
In addition, operating conditions affect the period. The razdatka of a car that drives on public roads experiences much less stress than that installed on a car that constantly moves off-road.
How to choose
Two types of fluid are poured into the transfer case: gear oil or ATF fluid. On vehicles with automatic transmission transfer case ATF is usually poured, with a manual transmission - a 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 an emulsion, foaming and other side effects.
For most modern cars having a dispenser, the manufacturer recommends using transmission oils class GL-5. They protect hypoid gears well, are designed to work in the most loaded mechanisms and contain extreme pressure additives.
Not the last 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 equivalent that has the appropriate approvals. 
What and how much to fill
The table below will allow you to choose oil by car brand and find out how much it 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, ATS-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 ( 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 ( kia sorento) | Dexron II, III (IDEMITSU Multi ATF, GT ATF TYPE Multi Vehicle IV) | 2 |
| kia sorento 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 (kia sportage 2) | 75W90 GL-5 (Mobil Mobilube HD 75W90 GL-5, Castrol 4008177071768 "Syntrax Longlife 75W-90) | 0,8 |
| kia sportage 3 (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 (range 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-140GL-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 in a 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, xl ( 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 (mitsubishi pajero 2) | 75W85GL4 | 2,8 |
| Mitsubishi Pajero 3 (mitsubishi pajero 3) | GL-5 80W-90, Castrol Syntrans Transaxle 75W-90 | 3 |
| Mitsubishi pajero 4 (mitsubishi pajero 4) | ENEOS GEAR GL-5 75W-90 | 2,8 |
| Mitsubishi Montero Sport (Mitsubishi Montero Sport) | Castrol TAF-X 75W-90 | 3 |
| Mitsubishi Delica (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 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 (opel antara) | GL-5 75W90 | 0,8 |
| Opel Mokka (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 (Suzuki Escudo) | SAE 75W-90, 80W-90 API GL-4 | 1,7 |
| suzuki grand vitara suzuki grand vitara) | 75W-90 API GL-4, SAE 80W-90 API GL-5 | 1,6 |
| Suzuki cx4 (suzuki cx4) | TAF-X | 0,6 |
| SSANGYONG | ||
| SsangYong Kyron ( SsangYong Kyron) automatic transmission | Dexron IID III | 1,3 |
| SsangYong Kyron (SsangYong Kyron) manual transmission | 80W90 API GL-4/GL-5 | 1,4 |
| SUBARU | ||
| Subaru Forester | no razdatki, 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 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 to API GL-3 | 0,7 |
| URAL | ||
| ural 4320 | TSp-15K | 3,5 |
| FORD | ||
| Ford Explorer 2013 ( ford explorer 2013) | Motul 75w140 | 0,4 |
| ford kuga ( ford kuga) | SAE 75W-90 | 0,5 |
| ford kuga 2 (ford kuga 2) | SAE 75W140 | 0,4 |
| Ford Maverick | SAE 75W140 | 2 |
| Ford explorer 5 (ford explorer 5) | SAE 75W140 (Castrol Syntrax Limited Slip 75w140) | 0,4 |
| VOLKSWAGEN | ||
| Volkswagen amarok (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 CRV (Honda CR-V) | razdatka combined with gearbox | |
| CHEVROLET | ||
| Chevrolet Niva (Chevrolet niva) | 80W-90 GL-4, 75W-90 | 0,8 |
| Chevrolet Captiva (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 (Chevrolet TrailBlazer) | GM Auto-Trak II | 2 |
Check level
On most vehicles, inspection windows are not provided to check the oil level in the transfer case. Level control and replacement is carried out through the filler hole.
To check, it is necessary to install the car on a flat surface and unscrew the filler bolt, or the control one, if any. Usually they are made under a four or hexagon, or under a wrench. 
A level just below the filler/check 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 development to be replaced.
How to change
The replacement procedure itself is simple, but is often complicated by the fact that access to the filler hole is difficult. A lift, viewing hole 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 for the cork is drilled at the bottom point and a thread is cut.
You will need:
- Special syringe for pumping out technical liquids(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 case oil (gear/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.
Has a drain hole
If your vehicle is equipped drain plug, it is necessary to unscrew the bolt and wait for the oil to drain completely. The magnet on the plug should be cleaned of wear products. Degrease the drain hole and plug, apply a layer of sealant and screw the plug into place.
Using a syringe, fill the dispenser with oil until it flows over the edge of the filler hole, then wrap the plug on 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 to the maximum extent possible. The procedure for filling new oil is no different from that described above.