One of the most loaded structural units in the VAZ 2107 vehicle is the rear axle, or rather its gearbox. However, it can serve for quite a long time if it is assembled and installed correctly. Equally important is timely maintenance and proper operation of the vehicle.
In accordance with the instructions, the oil composition in the rear axle of the VAZ 2107 model should be replaced immediately after break-in, even later - after the mileage is at least 2,000 km, and subsequently at intervals of 60,000 kilometers.
It is important to know that the VAZ 2107 gearbox contains a special type of hypoid transmission coupled with offset axes. This type provides a reduction in noise levels during the grinding of elements, however, the sliding that appears along the teeth can often lead to the risk of jamming, but this, however, can be eliminated by a special transmission oil fluid.
Changing the oil in the rear axle of a VAZ-2107
The rear axle gearbox of the VAZ-2107 is a complex device with the help of which crankshaft revolutions are converted into rotation of the rear wheels. The drive axle is fixed to the car body using rods. For reliable operation of the gearbox, a special lubricant is provided, which protects mechanical parts from premature wear. This device operates under large temperature differences and constant high load. Therefore, to protect surfaces, a special oil with enhanced protective properties is required.
How to change the oil on the rear axle of a VAZ 2107
The rear axle often operates at high temperatures (about 140 degrees). Under the influence of air, the composition of the lubricating fluid oxidizes, clots and sediment form, and viscosity decreases. As a result, the protective lubricant becomes useless. And the parts of the drive axle are destroyed. Changing the oil in the rear axle of a VAZ-2107 can significantly extend the life of the vehicle.
The design of the VAZ-2107 gearbox is a hypoid gear with offset axes. This structure reduces noise levels during grinding of mechanism parts. But at the same time, additional sliding can cause knots to jam. High-quality lubrication protects against the occurrence of this type of malfunction.
Steering of a VAZ 2107 car
On the VAZ 2107 model, the steering has a safety design with an articulated-lever steering wheel drive and a worm-roller gearbox.
- The steering gearbox is secured with three bolts in the engine compartment on the left side member.
- An adjusting screw installed on the top cover of the gear housing can be used to adjust the gap in the engagement of the double-ridge roller and the worm built into the structure of the device.
- Approximately 0.2 liters of oil is poured into the steering gear housing.
- To fill the oil, there is a filling hole on the top cover of the gearbox housing. There is no hole for draining the oil; fluid is only added to the VAZ 2107 if necessary.
Filling oil in the steering gearbox
Before adding oil, check the oil level:
- The vacuum booster is removed.
- Using a key set to “8”, unscrew the plug for filling oil into the gearbox, which has a conical thread.
Unscrewed plug from the filler hole of the steering gearbox
- A special rod is used to check the oil level. To do this, the rod is inserted all the way into the gearbox, as shown in the photo .
Checking the oil level
- From the top edge of the filling hole, the oil level should be at a depth of 15 millimeters.
- If you need to change the oil in the steering gear of a VAZ 2107, then use a spanner wrench to “13” to remove the four bolts that secure the lower cover of the gearbox.
- Just slide the lid and pour the oil into the container.
- The cover is put in place, secured with bolts and new oil is poured.
- The plug is screwed into the filler hole.
When replacement may be needed
The lubricant loses its properties over time. The oil in the bridge must be changed regularly, according to the instructions. But during operation, signs of malfunctions may appear, which indicate the need for a faster change of waste fluid:
- whistling and noise appear from the side of the bridge;
- when the nature of the load changes, knocking noises become audible;
- There are drips and traces of oil fluid on the gearbox.
The car care instructions state that in the VAZ-2107 the rear axle oil is changed for the first time after running in (2000 km). And then it needs to be changed every 60 thousand kilometers. But, given the difficult climatic conditions with ultra-low temperatures, bad roads and constant driving in city traffic jams, it is recommended to fill in new oil after 30 - 35 thousand kilometers. Unscheduled maintenance when purchasing a used car, major repairs are also accompanied by the replacement of lubricant.
The oil on the rear axle of the VAZ-2107 needs to be changed every 30 km
Experts advise changing the lubricant in different seasons (winter and summer). In winter, the oil composition should be more liquid, with a lower pour point. And in summer it is more viscous.
Checking the oil level
Control checks of the fluid volume in the gearbox should be carried out every 10 thousand kilometers, as well as when malfunctions or visual leaks occur. Checking the oil level in the rear axle is quite simple. To do this, you will need a container with a volume of about one and a half liters, a 17mm wrench and a screwdriver. The next steps are:
- the car is placed on a viewing hole, overpass or lift;
- the filler plug is cleaned of dirt;
- use a 17 key to unscrew the filler plug;
- The oil level is controlled with a screwdriver: the liquid should reach the edge of the hole.
If there is insufficient protective liquid, it is necessary to add it using a syringe or other device.
Oil change instructions
You can replace the gearbox lubricant in an inspection pit, overpass or lift. Before driving the car into the pit, you should drive a little and warm up the axle fluid. You should also prepare in advance a tool (a set of keys and screwdrivers), containers for working, protective gloves, rags, a special syringe or a device with a hose for pouring.
Changing the oil in the rear axle gearbox of the VAZ-2107 is performed in the following order:
- Clean the drain and filler plugs from any dirt.
- Using a 12mm wrench, unscrew the drain plug.
- Drain the old gear oil into the prepared container. Remember that the liquid will be hot after warming up.
- Tighten the drain plug.
- Unscrew the filler plug.
- Pour in enough oil to reach the bottom edge of the hole.
- Tighten the filler plug. Make sure there are no leaks.
If inspection of the used fluid shows severe contamination, then you need to rinse the gearbox before filling in a new one. To do this, mix transmission or motor oil with diesel fuel in a ratio of three to one. The resulting mixture is poured into the reducer. One wheel is lifted with a jack. The engine starts and first gear is engaged. This process takes several minutes. After this, the cleaning fluid can be drained and new drive axle grease can be added.
Which lubricant to choose
Many drivers have a reasonable question: what oil to fill? Mechanics recommend pouring oil into the rear axle gearbox of a VAZ-2107 with a viscosity of 75W90, 80W90 or another suitable one with API classification GL-4/GL-5. For example, Castrol 75W90, Lukoil 80W90. In winter, it is better to fill the rear axle of the VAZ-2107 with synthetics. In summer, mineral water.
Suitable oil for the rear axle of the VAZ 2107 - Castrol 75W90
Which oils are more suitable for the VAZ 2107?
In principle, any oil can be poured into the “seven”. The highest quality will, of course, be synthetic. Mineral water or semi-synthetic water will also not do any harm.
The cheapest is mineral liquid. However, it has a significant drawback - it begins to freeze quickly in cold weather. As a result, it is difficult to start the engine in sub-zero weather. You have to depress the clutch when starting the car.
Synthetics and semi-synthetics thicken less on cold days. However, their consistency has characteristic differences. Synthetics have high fluidity, which is why they are used in new manual transmissions. It begins to leak even with the smallest defect in the sealing gasket.
Semi-synthetic oil is thicker. Therefore, it is used in the manual transmission of a car that has covered more than 100,000 kilometers. If, after filling, the semi-synthetic material begins to ooze, then it is time to replace the failed parts.
Of course, each driver decides for himself which oil to use. But in any case, it is necessary to take into account all the nuances described above. Lubricant characteristics must comply with the manufacturer's recommendations. Replacement is carried out in accordance with the specified regulations. As a result, the gearbox will operate without repair for a long time.
Greetings) Of course, the oil in the axles changes depending on the mileage, but the car was recently purchased, what and when the previous owners filled in the axles is unclear, so I decided to change everything. To do this, I purchased 3 liters of Liqui Moly gear oil with a viscosity of 75W90 and 6 cans of Step-Up universal cleaner.
1) Clean the gearbox cover with a wire brush to remove any adhering dirt.
Something like this.
From under the dirt appeared the nameplates, in this case 3.73 (gear ratio).
Part number and year of manufacture (2004)
2) Unscrew the filler plug (3/8″ square). You should always start with the filler plug, because if it doesn’t come off, it’s better not to start.
3) Look how black the oil is.
4) Unscrew the cover bolts (head 17/32 - approximately 13.5 mm).
5) Remove the lid and drain the old oil. Be careful, don't get wet.
6) Thoroughly spray all the insides of the bridge with cleaner (you can use any automotive aerosol).
7) Use a wire brush to remove any remaining old sealant.
Once again we spill everything with cleaner.
9) Use a rag to collect the remaining cleaner from the differential housing.
10) Thoroughly blow out all the insides with compressed air (the task is to completely dry the remaining cleaner).
11) Moving on to the lid, it also needs to be thoroughly cleaned of sealant and dirt.
12) Wash and dry the lid.
Do not skimp on sealant; purchase only high-quality high-temperature automotive sealant.
13) Apply sealant.
The sealant must be applied in an even roller with a diameter of about 6 mm without breaks. The holes should be bypassed from the inside.
14) Carefully, trying not to lubricate the sealant, install the cover in place.
15) Tighten the fastening bolts with a torque wrench (torque 41 N*m). Carefully wipe off excess sealant with a rag. Do not rush to pour oil right away, let the sealant dry.
With the rear gearbox everything is exactly the same. The only thing is that its lid turned out to be more rusty. Therefore, it was decided to sandblast it.
Cover with soil.
And paint it.
Now she is already in her place.
I will describe the process of pouring oil in words - bring the car suspension into working position (support it from below or put it on the wheels), pour oil through the filler hole to the level of the plug (until it starts to pour back out), replace the plug (lubricating it with a thin layer of sealant). I hope this article is useful to you.
Ps I apologize for the poor quality of the photos, I took the photos on my phone.
I also adjusted the rear pads today, it looks like no one was there from the factory.
We didn’t use the handbrake because it was an automatic transmission. Tags:
What kind of oil to pour into the rear axle gearbox of a VAZ 2107
