To keep your car running smoothly, it needs constant care and maintenance. Of all the technical procedures, changing the oil in the rear gearbox is not the most frequent, but extremely important. A gearbox is a special gear mechanism that connects two axle shafts, which is responsible for converting engine power and transmitting it to the wheels. It allows the wheels to rotate at different speeds. Despite the complex design of the gearbox, changing the oil in the gearbox is quite simple with experience and skill.
How often should the gearbox oil be changed?
How often do you need to change the oil in the rear gearbox? It all depends on the car model and operating conditions. Experienced auto mechanics will tell you that when standard conditions operation, oil change in the gearbox is required on average every 40-60 thousand km of run.
With intensive use of the car, over time, slow oxidation and decomposition of the filled oil occurs in the gearbox housing. The reason for this phenomenon is the ingress of heated air into an insufficiently sealed system. The inevitable decrease in oil viscosity during operation also has a negative effect.
The task of a gearbox in a car is transmit and distribute torque from the engine to the wheels. This function is realized due to the interaction of rotating toothed gear shafts, differing in the number of teeth. Depending on the ratio of the number of teeth at the gears, the gearbox can either decrease or increase the torque, depending on the design features of the car.
Obviously, the constant interaction of metal elements in the absence of lubrication would be extremely short-lived. Therefore, a significant role in the operation of the gearbox is played by transmission oil ... It allows for optimal adhesion of the gear teeth to each other, reduces metal abrasion and, as a result, increases the life of the gearbox.
Performed, as a rule, simultaneously with the oil change in transmissions(and the oil itself coincides with the transmission oil), and its timely implementation is no less important for the gearbox than for the gearbox. For most cars, it is optimal to change the oil in the gearbox during the seasonal maintenance of the car (when changing from winter to summer operation and vice versa).
When is a gearbox oil change required?
Conventionally, there are three main reasons why it is important to change the oil in the gearbox:
- during intensive operation, thermal and oxygen exposure leads to the decomposition of hydrocarbons that make up the gear oil, which leads to metal corrosion;
- over time, the viscosity of the oil decreases, its properties deteriorate and, as a result, wear increases gear teeth of the reducer;
- in oil gradually wear products accumulate, which also impairs its lubricity and accelerates wear.
There are other situations in which changing the oil in the gearbox is recommended regardless of the mileage.
As a rule, the oil is changed upon purchase. "From the hands" of a used car if you do not have reliable data on the previous oil change (for example, in the form of a record in service book). Otherwise, there is a high risk of significantly exceeding the recommended replacement interval if the previous owner misleads you.
In addition, the oil is changed after serious renovation corresponding vehicle units (and, of course, after overhaul). Moreover, in this case, a repeated oil change is required after a break-in period (after 2-3 thousand kilometers, as in a new car).
Gearbox oil change intervals.
Define periodicity, with which the oil in the gearbox of your particular car should be changed will be easiest by studying the operating instructions. In the absence of such, you can focus on standard recommendations. Generally for vehicles with Manual transmission the recommended replacement interval is 50-60 thousand kilometers mileage. For vehicles with Automatic transmission mileage will be shorter by about half and will be 25-30 thousand kilometers.
It should be borne in mind that the frequency of replacement depends on the operating conditions of the car. In "difficult" conditions, the oil change in the gearbox must be carried out significantly more often.
To the conditions shortening the oil change interval in the gearbox, include:
- regular transportation of large loads, towing trailers or other vehicles;
- driving on unpaved country roads, driving with frequent slippage, driving on loose snow;
- driving for short distances with frequent braking and stopping (as a rule, this mode is typical for any metropolis).
When buying a new car, the manufacturer or dealer often notes the need for the first oil change after 2-3 thousand kilometers mileage. Such a short period is really justified. During the initial operation, intensive grinding of all vehicle units takes place, this process is inevitably accompanied by a significant formation of wear products. For the subsequent long-term trouble-free operation of the car, the oil must be changed after the first couple of thousand kilometers of running-in.
Self-change of oil in the gearbox
When changing the oil in the gearbox on their own, you need to pay attention to several nuances.
On most cars, changing the oil in the gearbox is not a laborious procedure (as opposed to repairing or replacing the gearbox itself), but it is optimal to perform it on inspection pit or overpass... This will allow you to install the car with the possibility of subsequent overhang of the wheel for flushing the gearbox.
The oil is drained when the engine is warm, so care should be taken when working to avoid burns as the oil temperature is very high. In this case, it is important to let the oil drain completely, since the heaviest suspensions remain in the thick sediment, which is the last to flow down.
On most vehicles, the drain plug design contains a magnetic part that attracts metal deposits. Therefore, when changing the oil, it is important to flush and drain plug.
If, upon external evaluation, the drained oil appears to be heavily contaminated, it is advisable to additionally flush the system special flushing liquid. Its density is much lower than that of ordinary oil, which literally allows to wash away the residues of dirt that have settled on the working surfaces of the gearbox.
After draining and cleaning, the gear unit can be filled with fresh oil.
As a rule, the oil change in the gearbox is carried out with an oil similar to the previously used one recommended by the car manufacturer.
In some cases, a car owner wishing to change the brand of the oil used can use the compatibility tables offered by the oil manufacturers. But, of course, it is most effective in this case to seek advice from specialists.
Also during maintenance, in addition to assessing the condition of the oil itself, it makes sense to pay attention to the condition oil seals gearbox, as through them oil can flow out of the gearbox.
The main task of the oil in the gearbox is to minimize the abrasion of the gear wheels, in other words, to increase their service life. Low quality lubricants, and untimely replacement, has a detrimental effect on the condition of the parts.
The replacement frequency is on average 50 thousand kilometers for cars with a manual transmission, and 30 thousand for an automatic one.
More often it is necessary to change the oil on cars, the operation of which takes place in difficult conditions, these include:
- Off-road driving;
- Constant maximum vehicle load;
- Frequent towing of cars or trailers.
In a new car, it is recommended to replace it after the first 2-3 thousand mileage. The fact is that at the initial stage of work, new units go through the so-called "lapping", in which an increased formation of wear products is characteristic.
Many car owners change the oil in the gearbox at the same time as the manual transmission, since transmission fluid is used in both units. 
Be sure to check the level and condition of the oil in the gearboxes after purchasing the car for secondary market... Usually, before the sale, the owners change if lubricants, then only in those places where they can be easily checked. Gearboxes are not one of these.
Checking the level and condition of the oil in the gearbox
The level and condition of the oil in the gearbox is checked "for cold" when all the fluid is collected in the crankcase.
The oil should be at the level of the filler hole, 2-5 millimeters lower. Unscrew for verification filler plug and with the help of a stick, wire, finger, or other improvised means, the level is recognized. The condition can be checked here by taking a small amount of liquid with a syringe and tube. 
You can also assess the condition of the lubricant by unscrewing the drain plug for a few seconds. Tighten the filler first, so the oil will flow much more slowly. If the car has stood for several hours before, all foreign particles will settle in the crankcase, and you will get a clearer picture of the condition of the oil.
The presence of metal particles in the mining indicates that the gearbox assemblies have a high degree of wear, and serious repairs and replacement of parts may soon be necessary.
What and how much to fill
It is best to fill the gearbox with gear oil recommended by the manufacturer. The information is indicated in the technical documentation, and it is very important to focus on compliance with the API class.
Almost all modern car manufacturers require the use in their transmissions, gearboxes and dispensers of oils not lower than GL-4 and GL-5, which contain extreme pressure and other additives, and are adapted to work in the most severe conditions. 
If you do not know what kind of oil and how much is poured into the gearbox of your machine, look for it in the table. We have collected information on tolerances for various vehicles from many available sources.
If there are 2 or 3 axles in the car, then the total amount of fluid is indicated.
LSD (Limited Slip Differential) is a limited slip differential.
| Automobile | Butter | Volume (L) |
|---|---|---|
| VAZ | ||
| 2101 | 80W90 or 75W90 | 1,50 |
| 2105/2106 | Lukoil 80W90 GL-5, TAD-17 80W-90 | 1,30 |
| 2107 | CASTROL Syntrans Transaxle 75W-90 API GL-4, Lukoil 80W90 GL-5 | 1,50 |
| 2121 | Lukoil TM-5 (75W-90, 80W-90, 85W-90), TNK Trans Gipoid (80W-90) | 2,50 |
| GAS | ||
| 53 | TAD-17 (TM-5-18) | 8,20 |
| 66 | TSP-14gip, Tap-15V, TAD-17i, TEP-15 | 14,10 |
| Valdai | TM5-18, TAD-17, Castrol Axle EPX 80W-90 | 8,00 |
| Next | Shell Spirax S5 ATE 75W-90, YOKO 75 W 90, TOTAL TRANS SYN FE 75W90, LIQUI MOLI GL4 / GL5 75W90 | 2,70 |
| Business | 75W90, 80W90 | 2,30 |
| 3110/31105 (Volga) | THK Trans 80W-90, ZIC G-5 80W90, TM-5 85-90 Lukoil | 1,70 |
| 3307/3309 | TSp-14gip, SAE 85W-90, 75W-90 | 8,20 |
| ZIL | ||
| 130 | TAD-17i (TM-5-18), 80W90 GL-5 | 10,50 |
| 131 | TSp-15K API GL-3 | 15,00 |
| 5301 (Goby) | TSp-14gip, TAD-17 (TM5-18) 80W90 Gl-5 | 3,30 |
| KAMAZ | ||
| 4308 | TSP-15k (TM-3-18) | 7,50 |
| 43118 | TSp-15K | 20,00 |
| 5320 | TSP-15k (TM-3-18) | 14,00 |
| 6520 | TSP-15k (TM-3-18), TAD-17 (TM-5-18), ZIC GFT 75W-90, | 14,00 |
| LUAZ | ||
| 969 | TM5-18, TAD-17 | 1,40 |
| MAZ | ||
| 5516 | TM-5, tsp-15k | 15,00 |
| Moskvich | ||
| 412 | TAD-17 Type TM-5-18 80W-90, 75W90 GL-5, | 1,20 |
| 2140 | 80W90 GL-5 | 1,30 |
| UAZ | ||
| Patriot | SAE 75W / 90 API GL-5, Zic G-F Top 75W-85, Castrol Syntrax Long Life 75W90 | 2,70 |
| AUDI | ||
| A6 C6 | SAE 75W90 GL-5 (MOTUL Gear 300 LS) | 2,40 |
| A4 | G 052 145 S 2 | 1,50 |
| Bmw | ||
| x5 f10 | BMW 33 11 7 695 240 "SAF-XO 75W-90 | 1,60 |
| x5 e60 | Castrol SAF-XO 75w90, Motul 75W90, MOTUL Gear Competition 75W-140 | 2,60 |
| x3 e36 (with lock) | 2,00 | |
| x3 e36 (no blocking) | 75W90 GL-5 | 2,00 |
| x3 e90 | Syntrax 75w90 | 1,00 |
| x5 e70 | 2,00 | |
| x5 e53 | Castrol Syntrax Longlife (SAF-XO) 75W-90, SYNTRAX 75W90 | 2,00 |
| x5 e34 (with lock) | 75W140 (CASTROL SYNTRAX LIMITED SLIP GL-5) | 1,70 |
| x5 e34 (no blocking) | 75W90 GL-5 | 1,70 |
| x5 e39 | 75W90 GL-5 | 1,20 |
| m5 e39 | Сasrtrol Syntrax Limited Slip 75W-140 | 1,20 |
| CADILLAC | ||
| CTS | 75W90 | 2,00 |
| CHEVROLET | ||
| Niva | 80W-90 GL-4 | 2,50 |
| Captiva | Castrol SYNTRAX UNIVERSAL 75W90 | 0,60 |
| TrailBlazer | 75W90 GL-4 / GL-5 | 3,00 |
| FORD | ||
| Explorer 5 | Castrol Syntrax Limited Slip 75w140 | 1,20 |
| EcoSport | Comma SX1L 75W90 Gl5 | 1,00 |
| Maverick | 80W90, 75W140 (Liqui Moly SAE 80W-90) | 1,50 |
| Transit | GL4 / 5 75W90 / 75W-140 | 3,00 |
| Kuga 2 | SAE 80W-90F | 1,20 |
| GREAT WALL | ||
| Safe | API GL-5 80W90, 75W90 GL-5 | 5,00 |
| Wingle 5 | 80W90 Gl5 | 4,30 |
| HAMMER | ||
| H3 | SAE 75W90 Grade GL-5 | 3,80 |
| HONDA | ||
| CR-V 1 | Honda dpf ii | 1,00 |
| CR-V 2 | DPS-F | 1,40 |
| CR-V 3 | Honda dps-f | 1,40 |
| CR-V 4 | DPSF-II | 1,40 |
| Stepwagon | DPF II (DPS-F) 082009007 | 1,20 |
| HYUNDAI | ||
| Santa fe | Shell Spirax AXME 75W90 | 1,00 |
| Santa Fe (high friction reducer) | CASTROL SYNTRAX LIMITED SLIP (75W-140) | 1,00 |
| ix35 | 75W90 | 0,80 |
| Tucson | 80W90 GL-4 / Gl-5 (Shell Spirax S3 AX 80W-90), 75W90 GL-5 (Castrol Syntrax Universal 75W-90) | 0,90 |
| Galloper | SAE 80W90 API GL5, 75W90 GL-5 (Mobilube Syn LS 75W-90, Castrol SAF-XJ 75W-140) | 3,50 |
| Grand starex | GL-5 75W-90 | 2,20 |
| Porter | SAE GL-5 75w90, 75W140 | 2,80 |
| KIA | ||
| Sorento 2 | Castrol Syntrax Universal Plus 75W90, RAVENOL TGO 75W90 | 1,00 |
| Sportage 2 | 75W90 GL-5 (Mobil Mobilube HD 75W90 GL-5, CASTROL 4008177071768 "Syntrax Longlife 75W-90) | 0,80 |
| Sportage 3 | GL5 75W90 LSD, Liqui Moly SAE 75W-90 GL5 | 0,65 |
| LAND ROVER | ||
| Evoque | Castrol Syntrax Long Life 75w90 | 2,00 |
| Freelander | LR003156, Castrol Syntrax Long Life 75W-140 | 0,70 |
| Freelander 2 | Castrol EPX oil | 0,70 |
| Range rover (front) | CASTROL SYNTRAX LONG LIFE 75W-90 | 0,80 |
| Range rover (rear without locking) | CASTROL SYNTRAX LONG LIFE 75W-90 | 1,60 |
| Range rover (rear with blocking) | Castrol SAF-XJ 75W-140 | 1,80 |
| Discovery 3 | Castrol SAF-XO | 1,70 |
| LEXUS | ||
| Is 250 | Toyota Gear Oil LT 75W-85, Castrol TAF-X 75W90 | 2,00 |
| Rx 300 | 80-W90 | 0,90 |
| MAN | ||
| TGA | syntrax longlife 75w-90 | 15,00 |
| MAZDA | ||
| CX-5 | Neste Hypoidi S 75w-90 GL-5 | 0,45 |
| CX-7 | API GL-4 / GL-5 80W90 | 1,00 |
| Titan | 75W90 GL-5, 80W90 Gl4 / Gl5 | 3,00 |
| MERCEDES | ||
| Atego | 80W-90, 85W / 90, 75W-90 | 6,80 |
| ML | 85W90 GL5 | 3,00 |
| w123 | SAE 85W90 Gl5, SAE 80W890 GL5 | 2,00 |
| w124 | MB 235.0 - 85W90, MB 235.7 А 001 989 33 03 - 75W-90 (Spirax S6 AXME 75W-90, Fuchs TITAN SINTOPOID FE 75W-85, Mobilube FE 75W-85) | 1,10 |
| w164 (no blocking) | 235.7 / 235.74 a0019893303 | 2,20 |
| w164 (rear with locking) | 235.15 a0019895903 | 1,60 |
| w202 | 75W85 | 1,00 |
| w203 / 210 | MERCEDES A 001 989 33 03 "75W-85, Fuchs TITAN SINTOPOID FE 75W-85 | 1,00 |
| w204 / w211 / w212 | 235.7 (75W90) | 1,60 |
| w204 / w211 / w212 (back 204.077 / 277) | 236.61 (75W140) | 1,20 |
| Sprinter | Castrol Syntrans Multivehicle 75W-90, TITAN SINTOFLUID FE SAE 75W | 1,80 |
| Gelandwagen | 75W90 Gl-4 / GL-5, 75W85, 75W140 | 3,00 |
| MITSUBISHI | ||
| Outlander xl | 80W90 Gl-5, 75W90 GL-5 (Motul GEARBOX 80W-90, MOBILUBE 1 SHC 75W-90, Eneos gear 80W90 Gl-5) | 0,50 |
| Delica | 80W90 GL-4 | 2,50 |
| Pajero Sport (front) | Castrol syntrax long life 75W-90 | 0,90 |
| Pajero Sport (rear with LSD) | Mobilube SYN LS 75W-90, Mobil 1 Synthetic Gear Lube LS 75W-90 | 2,60 |
| Pajero Sport (rear without LSD) | Castrol syntrax long life 75W-90 | 2,60 |
| L200 | GL-5 SAE 80W | 3,80 |
| Pajero 4 | GL-5 SAE 80W | 2,75 |
| Nissan | ||
| Atlas | SAE 75W90 Gl-4 | 2,00 |
| Pathfinder (front) | Nissan Differencial fluid 80w-90 | 0,80 |
| Pathfinder (rear) | 75W-90 | 1,80 |
| Murano | Nissan GL5 ke907-99932 80w90 | 0,55 |
| NP300 | NISSAN KE907-99932 "Differential Oil 80W90 | 2,60 |
| X trail t31 | Nissan Differential Fluid (KE907-99932), Castrol Syntrax universal plus 75w90 GL-4 / GL-5 | 0,60 |
| Juke | NISSAN DIFFERENTIAL FLUID SAE 80W-90 | 0,40 |
| Qashqai | API GL-5 SAE 80W-90 | 0,55 |
| OPEL | ||
| Antara | LM Hypoid-Getriebeoil TDL (GL-4 / GL-5) 75W-90, MOBILUBE 1 SHC 75W-90 Gl4 / GL5, Motul Gear 300 75W90 | 0,60 |
| Omega B | 90W 19 42 387 | 1,20 |
| PEUGEOT | ||
| 4007 | Total Transmission X4 GL-5 SAE90 | 0,50 |
| RENAULT | ||
| Duster | Elf TransElf Type B 80W90 | 0,25 |
| SCANIA | ||
| 113 | 80w140 | 13,00 |
| SKODA | ||
| Yeti | CASTROL Syntrax Longlife 75w90 | 2,00 |
| SSANGYONG | ||
| Rexton (front with IOP) | 80W90 | 1,00 |
| Rexton (front no IOP) | 75W90 | 1,00 |
| Rexton (rear continuous) | 80W90 GL-5 | 1,50 |
| Rexton (rear IRS) | 75W90 | 1,50 |
| Actyon sports | 80W90 API GL-5 | 3,30 |
| SUBARU | ||
| Forester | SAE 75W90 (MOTUL Gear 300 75w90, Castrol Syntrax Universal Plus) | 2,00 |
| Impreza / Legacy | API GL-5, SAE 75W90 (Gear 300 75W90) | 2,00 |
| Outback | 75W90 GL5 | 2,20 |
| SUZUKI | ||
| Sx4 | Suzuki Gear Oil SAE 80W-90, SAE 80W-90 according to API GL-5 | 0,80 |
| Grand vitara | SAE 80W-90 API GL-5 | 1,80 |
| TOYOTA | ||
| Fielder | Hypoid Gear Oil SX API GL-5 SAE85W-90 | 0,50 |
| Highlander | LT 75W-85 GL-5 TOYOTA | 0,50 |
| Hiace | Toyota API GL-5 SAE80W-90 | 1,50 |
| Hilux | 75W90 | 4,60 |
| Rav 4 | Toyota Synthetic Gear Oil API GL4 / GL5, SAE 75W-90 | 1,00 |
| Town ace | Toyota Gear Oil SX GL-5 85w90 | 2,20 |
| Prado 80 | API 75W90 Gl-5 | 6,00 |
| Prado 100 | 75W90 GL4 / GL5, Motul 75W90 Gear | 3,50 |
| Prado 120 | Toyota Gear Oil 80W-90 Gl-5 | 4,00 |
| Prado 120 (LSD) | Toyota Hypoid Gear Oil LSD 85W-90 | 4,00 |
| VOLKSWAGEN | ||
| Tiguan | 75W90 | 1,70 |
| Tuareg (front) | VAG G052145S2 75-w90 API GL-5 | 1,00 |
| Tuareg (rear with blocking) | VAG G052196A2 75-w85 LS | 1,60 |
| Tuareg (rear without locking) | VAG G052145S2 | 1,30 |
| Crafter | VAG G 052 145 S2, VAG G 052512A2, Castrol Syntrax Long Life 75W-90 | 1,80 |
| VOLVO | ||
| XC60 | Volvo 80W API GL-5, 1161620 | 1,00 |
| CX90 | 80W-90 API GL-5 | 0,60 |
Change of oil
It is better to replace it after traveling a short distance (5-10 kilometers). This will allow the oil in the gearbox to warm up and become less viscous.
The car must be in a horizontal position, it is most convenient to work in an inspection pit, on an overpass or using a lift. This will make it easier to get to the gearbox. Use a metal bristle brush to clean around the fill and drain holes.
It will not be superfluous to pay attention to the condition of the oil seals, when worn out, oil can flow out of the gearbox. If you see smudges in the area of the oil seals, it is also better to change them right away.
The oil level is checked without fail. In addition, the grease must be changed in accordance with the manufacturer's recommendations, as well as taking into account the current operating conditions of the machine.
When is the rear axle oil change required?
If, when accelerating a car, uncharacteristic sounds appear in the area rear axle(usually a dull hum), it is necessary to change the oil in the bridge. This symptom can be detected not only after 60-75 thousand km of run, when usually there is a need to change the lubricant, but much earlier. In the latter case, muffled 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 a low-quality fake, it is necessary to partially disassemble the bridge, drain the grease, 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 after the completion of work and troubleshooting, the oil in the bridge is always changed. Replacing the bridge with a new one is also associated with the need to fill in fresh oil. Timely lubricant change slows down the natural wear of the unit and makes it smoother. The oil must be changed periodically, and the experience of drivers shows that the terms set by the manufacturers when driving on domestic roads are clearly overestimated. That is why it is worth changing the oil more often than indicated in the instructions. Usually, the lubricant is changed after 2-3 thousand km of run in new car, and then every 50-60 thousand kilometers.
Standard Sequence for Axle Oil Change
To change the rear axle oil, fix the car with stops, clean the area where the drain plug is located from dirt deposits, and then unscrew it. Next, you need to wait until the grease unsuitable for further use completely drains into the container prepared for this. After that, the drain plug is installed in its original place.At the next stage, the cover is cleaned, on which the oil filler hole is located, then the corresponding plug is removed. Only now can you pour in fresh oil, while it is important to monitor its level. The required amount of grease for the auto axle is 1.5-1.8 liters (depending on the model). The oil filler plug is then tightened tightly.
Why do they pour m aslo in the rear axle gearbox? Timely filling of oil fluid into the rear axle gearbox is necessary in order to improve the interaction of the unit parts, to extend their operational period. Usually, car parts 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 transfer case and the rear gearbox, to 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 reducer (transfer case) is a unit combined with each other, transmitting torque from power unit to the wheels. The gearbox is subjected to different loads, the degree of which depends on the speed. In view of this, friction appears in him, which has a destructive effect on his state. In order to compensate for this effect, a special lubricant is used to soften the movement of the moving parts and ensure their integrity. Changing the oil in the gearbox is an important procedure that must not be neglected.
It is necessary to change the oil in the rear axle approximately every thirty-five thousand kilometers. This replacement frequency is recommended by renowned 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). These include:
- reducing the amount of car 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 car
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 the usual leaks arising from increased loads.
The appearance of gray dust is a sign of worn parts. The outer layer of spare parts wears off over time, precipitates. Getting into the car oil, the sediment begins to circulate throughout the lubrication complex. If it gets on an important part, its holes may be partially blocked. This could lead to damage. Pour fresh lubricant into the gearbox immediately if this problem is detected. If you find metal particles, shavings in the car oil, then you need to overhaul the engine and completely replace the damaged parts.
A change in the color of a petroleum 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 car oil. The molecular structure of the petroleum product is disrupted. Such oil is incapable of efficiently lubricating parts.
If you find at least one of the above symptoms, replace the oil fluid immediately. You can use the services of a car service. Its employees will replace the car oil in a short time. transfer case... You will only need to pay them for the work. If you change the oil product yourself, you can save a lot (provided that the replacement is carried out correctly). However, changing the lubricant, it is difficult to make such a mistake that could completely remove vehicle out of service. The most dangerous thing that can happen is that you get burned with waste oil. 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 car oil in the rear axle gearbox
How is the oil change in the rear axle gearbox carried out? The algorithm is as follows:
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.
Which car oil to choose?
What kind of oil to fill? It is possible to use both mineral water and synthetics. Due to its own composition, synthetics resist wear better than mineral water made through petroleum refining, which must be changed frequently. Plus mineral oil its rather small price is considered. Special additives are added to synthetics, which increase the operating period of such a car oil 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 still semi-synthetic oil products. They are not as expensive as synthetic ones, while they have rather high technical characteristics(constant viscosity index, excellent lubrication performance). It is not for nothing that semi-synthetics have become so popular among many car owners in the Russian Federation.
