Rear axle VAZ 2107: design and repair, replacement of the shank oil seal, instructions with photos and videos

The rear axle is a fairly reliable unit of the VAZ 2107, but despite its massive appearance, the mechanism requires regular maintenance, without which it can fail prematurely. This unit can serve for quite a long time if it is operated correctly and carefully, if possible avoiding extreme driving conditions of the vehicle. Calm and careful driving without sharp pressing of the gas and brake pedal, hard clutch engagement and similar overloads will contribute to the serviceability and durability of the rear axle.

Specifications
What is the rear axle made of?
Frame
Gearbox
Half shafts

Symptoms of a problem

Grinding noise when moving

The cardan spins, but the car does not move

Oil leakage from the housing and from the shank side

Wheels are stuck and won't rotate

Rear axle repair

Shank bearing

Axle bearing

Shank seal leak

Shank play

Video: we measure the shank play ourselves

Checking the oil in the gearbox

Video: changing the oil in the gearbox yourself

Functions of the rear axle VAZ 2107

The seventh VAZ model completes the line of rear-wheel drive cars produced by the Volga Automobile Plant: all subsequent models, starting with the VAZ 2108, were equipped with front-wheel drive or all-wheel drive. Thus, the torque from the “seven” engine is transmitted to the rear wheels through other transmission elements. The rear axle is one of the components of the transmission, including the differential and final drive . The differential serves to distribute torque between the axle shafts of the rear wheels when the car turns or moves on an uneven road. The main gear amplifies the torque, which is transmitted to the axle axle shafts through the clutch, gearbox and cardan shafts. If the resulting torque is taken as 1, then the differential can distribute it between the axle shafts in a ratio of 0.5 to 0.5 or in any other ratio, for example, 0.6 to 0.4 or 0.7 to 0.3. When this ratio is 1 to 0, one wheel does not rotate (for example, it fell into a hole), and the second one slips (on ice or wet grass).

The seventh VAZ model completes the line of rear-wheel drive cars produced by the Volga Automobile Plant

What tools are needed for removal

In order to make repairs, you need to remove the rear axle. To do this you will need the following tools:

Socket and open-end wrenches.
Punch and chisel.
Hammer.
Bearing ring puller.
A simple pencil (or better yet, a core).
Torque wrench.
Set of probes.
Container for draining lubricant.
Calipers.

It is advisable to carry out repairs by placing the car on a viewing hole or lift. But if there are no such amenities, you can raise the entire rear part as much as possible above the ground. Just make sure that the front wheels are secured as securely as possible.

What is the rear axle made of?

The design of the rear axle of the “seven” includes a fairly large number of elements, including:

Brake drum mounting bolts.
Guide pins.
Axle bearing oil deflector.
Brake drum.
Drum ring.
Rear brake cylinder.
Brake bleeding fitting.
Axle bearing.
Bearing lock ring.
Bridge beam flange.
Stuffing box.
Spring support cup.
Bridge beam.
Suspension bracket.
Axle guide.
Differential bearing nut.
Differential bearing.
Differential bearing cover.
Breather.
Satellite.
Driven gear of the main gear.
Left axle shaft.
Axle gear.
Gearbox housing.
Drive gear adjusting ring.
Spacer sleeve.
Drive gear bearing.
Stuffing box.
Mud deflector.
Flange-fork of the cardan joint.
Screw.
Oil deflector.
Main gear drive gear.
Axle of satellites.
Axle gear support washer.
Differential box.
Right axle shaft.
Axle shaft brackets.
Axle bearing thrust plate.
Rear brake shield.
Rear brake pad.
Friction lining.
Axle shaft flange.
Locking plate.
Bearing cover mounting bolts.

The rear axle consists of the components of axle shafts, gearbox and final drive

Frame

All working mechanisms of the rear axle are located in the beam, as well as in the gearbox housing. The beam is made of two casings connected by longitudinal welding. The bearings and seals of the axle shafts are located in flanges at the ends of the beam. In addition, the suspension fastening elements are welded to the beam body. In the middle the beam is widened and has an opening in which the gearbox housing is fixed. A breather is installed in its upper part, through which the connection between the bridge cavity and the atmosphere is maintained, so that the pressure in the cavity does not rise above the permissible level and dirt does not get inside the part.

All working mechanisms involved in transmitting torque are located in the axle beam and gearbox housing

Gearbox

The main gear consists of drive and driven gears that have hypoid gearing, i.e. the axes of the gears do not intersect, but intersect. Thanks to the specific shape of the teeth, simultaneous engagement of several of them is ensured and, as a result, the load on the teeth is reduced and their durability increases . A two-satellite bevel differential, in addition to the satellites located on a common axis, includes a box and two gears, while the satellites are in constant mesh with the gears.

The rear axle gearbox of the VAZ 2107 contains a differential and final drive

Half shafts

The “Seven” is equipped with so-called semi-balanced axle shafts of the rear axle, which take on bending forces in both the horizontal and vertical planes. The axle shaft, in essence, is a shaft made of 40X steel, with splines on the inner end and a flange on the outer end. The inner end of the axle shaft is connected to the differential gear, the outer end is located in the flange of the beam, to which the brake drum and wheel are attached. The axle shaft is held in place by a thrust plate of the bearing, which is also fixed to the beam.

The VAZ 2107 is equipped with semi-balanced axle shafts of the rear axle, which take on bending forces in both horizontal and vertical planes

Disassembling the unit

To disassemble the gearbox, you will need to do the following:

Unscrew the shank securing nut.
Remove the flange, then remove the drive gear along with the adjusting rings.
Remove the oil seal, inner race on the bearing and oil deflector.
Using a puller, remove the outer rings from the bearings.
Disassemble the drive gear along with the differential mechanism. Subsequently, the spacer sleeve must be replaced.

When disassembling the mechanism, be sure to mark the bearing caps so that they can be installed in the same way during reassembly. It is recommended to use a pencil or core to make marks. Label the right and left covers to avoid confusion during installation. It is advisable to mark these covers using a core.

Using a drift and a hammer, you need to remove the separator and the inner rings. Please note that you should not knock too hard. The rings are knocked out by lightly tapping in a circle. If you hit only one point, the ring will not come out. When repairing a rear gearbox, the bearings or the main pair are usually replaced. These are the most vulnerable elements of the system.

Symptoms of a problem

As soon as the driver notices any changes in the operation of the rear axle (for example, extraneous sounds appear that were not there before), he must respond to these changes as quickly as possible so as not to aggravate the possible malfunction. The most typical sign of such problems may be increased noise levels:

coming from the rear wheels;
during operation of the rear axle;
when accelerating the car;
when braking with the engine;
during engine acceleration and braking;
while the vehicle is turning.

In addition, a knocking sound when the car starts moving and an oil leak may indicate a malfunction of the rear axle.

Oil leakage indicates a malfunction of the rear axle of the VAZ 2107

Grinding noise when moving

The causes of a grinding noise from the rear axle when the vehicle is moving can be:

wear or destruction of axle or differential bearings;
deformation of the beam or axle shafts;
incorrect adjustment, damage or wear of gears or bearings of the gearbox and differential;
wear of the spline connection with the semi-axial gears;
incorrect adjustment of the gear teeth of the main gear;
insufficient amount of oil.

The cardan spins, but the car does not move

If the driveshaft rotates while the vehicle is stationary, the cause may be a failed axle spline or wear on the teeth of the differential or final drive gears. In any case, if the cardan spins, but the car does not move, this indicates a fairly serious breakdown and, most likely, replacement of the axle shafts, bearings or gears will be required.

Oil leakage from the housing and from the shank side

The most likely causes of oil leakage from the rear axle housing:

wear or damage to the drive gear seal;
wear of the axle shaft seal, determined by oiling of the brake shields, drums and pads;
loosening the bolts securing the rear axle gearbox housing;
damage to sealing gaskets;
axial play of the shank;
breather jamming.

Wheels are stuck and won't rotate

If the rear wheels are jammed, but the drum and pads are in order, the cause of this malfunction may be failure of the bearings or the axle shaft itself. Most likely, in this case, the bearings have crumbled or the axle shaft has become deformed (for example, due to an impact) and the parts need to be replaced.

A little leaked oil from the axle through the axle seal + dust from the pads = good “glue”. Bottom line: remove the drum and look. If all the springs are in place and the block is not torn, then take sandpaper and clean the drum and shoes. Pre-wash them with carburetor cleaner or similar liquid. Sold in cylinders.
underwater snake
https://auto.mail.ru/forum/topic/klassika_zaklinilo_zadnee_koleso_odno/

Repair and adjustment

Both repairs and subsequent adjustments require special skills and professional equipment; stands, pullers, special tools. Therefore, we will consider only the general principles by which repairs and post-repair adjustments of the gearbox are carried out in order to assess the required amount of work and the costs of purchasing spare parts.

The gearbox structure can be viewed in the following diagram:

Disassembling the gearbox begins with unscrewing the shank nut. After removing the flange, the drive gear with adjusting rings, oil seal, oil deflector, and inner bearing ring are removed. Then we press out the outer rings of the bearings. Lastly, the drive gear and differential are disassembled. When completely disassembled, the spacer sleeve is discarded.

It is not recommended to carry out the work described above related to disassembling the VAZ 2107 gearbox, due to its complexity. This is a rare case when you shouldn’t skimp on the services of specialists.

Most often, the bearings and the main pair of this unit fail, for which replacement with new ones is provided. It should be noted that it is the main pair that determines the gear ratio. There are three standard varieties of the main pair, with different gear ratios. The higher this number, the higher the power; the lower, the higher the speed of the gearbox. When replacing these parts, the spacer sleeve must be replaced, since it is disposable.

Some car enthusiasts use final drives as a way to tune their cars. By installing a main gear with a reduced gear ratio in the VAZ 2107 gearbox, they significantly increase the maximum speed of their car. In principle, the gear ratio can be selected for all rear-wheel drive cars without exception, guided only by your own needs. The gearbox of the VAZ 2102 had the largest gear ratio - 4.4. But after it was discontinued, finding a main pair with the same gear ratio became extremely problematic.

Repair is not advisable in all cases. For a rear axle gearbox that is too worn, it is more profitable to completely replace it with a new one. The difference in price will be compensated by the reduction in the cost of work performed by specialists and the durability of the new unit.

Checking the oil in the gearbox

For the rear axle gearbox of the “seven”, semi-synthetics with viscosity parameters 75W-90 are suitable, for example:

CASTROL Syntrans Transaxle 75W-90 API GL-4;
"Lukoil 80W90 GL-5" and others.

1.35 liters of oil is poured through a special filler hole on the gearbox housing. If you need to drain the used oil, there is a drain hole in the bottom of the gearbox for this purpose. Before draining the old oil, it is recommended to warm up the car, place it on a flat surface and jack up the right side of the car . If there are metal shavings in the waste, you should rinse the gearbox container with a special liquid or spindle oil.

For the rear axle of the VAZ 2107, CASTROL Syntrans Transaxle 75W-90 API GL-4 oil is suitable

It is convenient to fill in new oil using a special syringe, which can be purchased at a car store. Both plugs (drain and filler) should be securely tightened, and then check the condition of the breather, which should move freely. If the breather jams, the contact of the container with the atmosphere will be disrupted, which will lead to an increase in internal pressure, damage to the seals and oil leakage. The oil level in the rear axle gearbox is considered normal when the liquid reaches the lower edge of the filler hole.

Video: changing the oil in the gearbox yourself

Repairing and adjusting the most critical components of the rear axle, as a rule, requires some practice, so it is best to perform it under the guidance of an experienced specialist. If you hear extraneous sounds from the rear axle while driving, you should immediately determine the cause of their occurrence. By ignoring such noises, you can “start” a breakdown and subsequently face complex and expensive repairs. Following simple rules for operating and maintaining the rear axle will extend the life of the vehicle for many years.

How to determine a breakdown

The cost of the VAZ-2107 gearbox is very high, and repairs are difficult. Not every driver can handle servicing this mechanism. Therefore, before starting work, you need to make sure that it is this gearbox that makes the noise. Follow these steps:

On a flat stretch of road, accelerate from 20 to 90 km/h. Listen for any strange noises coming from the rear of the car. Do this carefully, acceleration should be smooth.
Then you need to release the gas and apply engine braking. Pay attention to whether any extraneous sounds appear from the rear gearbox.
After this, accelerate the car to 100 km/h, turn on neutral speed and turn off the engine. At the same time, while the car is moving by inertia, note for yourself whether any extraneous noise occurs.

A continuing hum, both with the speed turned on and off, indicates that the gearbox is fully operational and there are no problems with it. In the same case, when noises are heard only while driving at high speed, it is necessary to replace or repair the rear axle.

Article: 21010-2401050-00, additional articles: 21010240105001, 2101-2401050-01

Order code: 003040

You may need
show more

Passenger cars / VAZ / VAZ-21011 drawing

» href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2101-3/most_zadniiy_i_poluosi-133/#part3026″>Crankcase breatherRear axle / Rear axle and axle shafts

Passenger cars / VAZ / VAZ-21031 drawing
» href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2103-106/most_zadniiy_i_poluosi-103/#part11161″>Crankcase breatherRear axle / Rear axle and axle shafts
Passenger cars / VAZ / VAZ-21051 drawing
» href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2105-6/most_zadniiy_i_poluosi-108/#part17696″>Crankcase breatherRear axle / Rear axle and axle shafts
Passenger cars / VAZ / VAZ-21071 drawing
» href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2107-8/most_zadniiy_i_poluosi-154/#part25092″>Crankcase breatherRear axle / Rear axle and axle shafts
Passenger cars / VAZ / VAZ-21211 drawing
» href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2121-13/most_zadniiy_i_poluosi-108/#part59721″>Crankcase breatherRear axle / Rear axle and axle shafts
Passenger cars / VAZ / VAZ-21231 drawing
» href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2123-315/most_zadniiy_i_poluosi-141/#part978114″>Crankcase breather Rear axle / Rear axle and axle shafts
Passenger cars / VAZ / VAZ-21213-214i1 drawing
» href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_21213_214i-1240/most_zadniiy_i_poluosi-202/#part2990099″>Crankcase breather Rear axle / Rear axle and axle shafts
Passenger cars / Chevrolet / Chevrolet Niva 1.71 drawing
» href=»/catalog/chevrolet-125/legkovye_avtomobili-30/chevrolet_niva_1_7-1233/most_zadniiy_i_poluosi-170/#part2974637″>BreatherAxles / Rear axle and axle shafts
Passenger cars / VAZ / Lada 4×4 Urban1 drawing
» href=»/catalog/vaz-3/legkovye_avtomobili-30/lada_4x4_urban-1885/b530__most_zadniiy_i_poluosi-134/#part4207496″>BreatherBridges / B530. Rear axle and axle shafts
Passenger cars / VAZ / VAZ-21021 drawing
» href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2102-4/most_zadniiy_i_poluosi-133/#part7510″>Crankcase breatherRear axle / Rear axle and axle shafts
Passenger cars / VAZ / VAZ-21041 drawing
» href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2104-5/most_zadniiy_i_poluosi-108/#part14590″>Crankcase breatherRear axle / Rear axle and axle shafts
Passenger cars / VAZ / VAZ-21061 drawing
» href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2106-7/most_zadniiy_i_poluosi-113/#part20827″>Crankcase breatherRear axle / Rear axle and axle shafts
Passenger cars / VAZ / VAZ-2120 “Nadezhda”1 drawing
» href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2120__nadejda_-245/most_zadniiy_i_poluosi-119/#part56662″>Crankcase breatherRear axle / Rear axle and axle shafts
Passenger cars / VAZ / VAZ-21311 drawing
» href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2131-73/most_zadniiy_i_poluosi-195/#part64595″>Crankcase breatherRear axle / Rear axle and axle shafts
Passenger cars / VAZ / VAZ-212131 drawing
» href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_21213-731/most_zadniiy_i_poluosi-148/#part2010735″>Crankcase breather Rear axle / Rear axle and axle shafts
Passenger cars / VAZ / LADA 4×4 M1 drawing
» href=»/catalog/vaz-3/legkovye_avtomobili-30/lada_4x4_m-1456/most_zadniiy_i_poluosi-148/#part3241323″>Breather Rear bridge / Rear bridge and axle shafts
Passenger cars / VAZ / LADA 4×41 drawing
» href=»/catalog/vaz-3/legkovye_avtomobili-30/lada_4x4-1887/b530__most_zadniiy_i_poluosi-154/#part4214785″>BreatherBridges / B530. Rear axle and axle shafts
Special equipment / Geomash / BBU-000 “Openok”1 drawing
» href=»/catalog/geomash-114/spectehnika-42/bbu_000__openok_-1229/vrashatel-16/#part2966644″>Breather 2101-2401050-01Block drilling rig BBU / Rotator

There are no reviews for this product yet.

Today, the next article in the series “Crystal VAZs or typical breakdowns of domestic cars” is dedicated to the “classics”: VAZ-2101, 2103, 2104, 2104, 2105, 2106 and 2107. These cars have been driving along our roads for decades and, despite Despite all the shortcomings that we will talk about, their popularity is still high.

The series of articles 'Crystal VAZs or typical breakdowns of domestic cars' introduces car enthusiasts to typical faults that arise when operating AvtoVAZ cars. This article is dedicated to the favorite of hunters and fishermen - “Niva”.

Advertisements on NN.RU - Auto

Extend the chassis (frame) on Gazelle Next, Gazelle farmer under a body of 4.2 m, 5.1 m and 6.2 m. Extend the frame on Gazelle Next, Gazelle Gas 3302. Price: 25,000 rubles.

Lengthen Kamaz under a body 7.5 m Lengthen Maz Zubrenok, Maz under a body 9 m Re-equipment of the chassis of an extended truck.

Manufacturing of a broken-type platform with retractable ramps on the GAZ-33023 Gazelle-farmer chassis. Technical characteristics of the tow truck.

Lengthen Gas 331043, 331063 Valdai-farmer for installation of a body 5.1/6.5 m. The chassis is lengthened by increasing the wheel size.