DIY hand-out repair Niva 2121

In detail: do-it-yourself hand-out repair Niva 2121 from a real master for the site my.housecope.com.

The transfer case of the Niva car and some other off-road vehicles is designed to distribute the torque of the wheels both between the axles and between different wheels of the same axle. This is done in order to increase cross-country ability on particularly difficult sections of the track. In the language of specialists, this device is called a "demultiplier".

The location of the transfer case in the car Niva 21213

The transfer case takes an intermediate position in the vehicle transmission between the gearbox and the propeller shaft. It has its own body in which its component parts are located.

The distribution box helps to realize the capabilities of the SUV, such as:

Center differential lock.
Disconnection of the driving axle.
Increasing the torque of the driving wheels.
Distribution of torque along the wheel axles.

Violation of the normal operation of the transfer case of the VAZ-21213 can be assumed by the following signs:

Delays when connecting the front wheel drive.
Overheating of the transfer case.
High consumption of transmission oil.
Spontaneous disengagement of the front axle.

There is nothing fundamentally complicated in the demultiplier device, except that it itself is not attached to the main gearbox as on more modern all-terrain vehicles. Intermediate propeller shafts extend from the transfer case to the manual transmission. The rest of the device is represented by gears, satellites and bearings. Also included in the design is a free differential with a lock.

The machine must be installed on an inspection pit or lift.
The transfer case levers are set to neutral.
The lining of the central floor tunnel is removed.

Video (click to play).

The tunnel cover must be removed to gain access to the hatch of the transfer case levers

Handles and covers of all levers are neatly removed

We get access to the insides of the dispenser

It is necessary to remove the sensor connected to the speedometer from the distributor

Drive shafts fit to the front and rear transfer case

When removing the box, the main thing is not to overdo it.

Install the engine mount brackets correctly.
Install the transfer case without tightening the bolts of its fasteners to the end.
The flanges of the drive shaft of the box must match the intermediate propeller shaft.
Install the transfer case supports and secure the fasteners.
Connect the transfer case to the front and rear driveshafts, reinstall the differential lock sensor.

Centering the demultiplier can be done in different ways. The classic version of centering is that the car is installed on a lift or a viewing hole, and all operations are performed by two people, one of whom is sitting behind the wheel. The procedure is performed as follows:

The fourth gear turns on, the blocking is turned off.

We put the distributor in neutral position, turn on the 4th gear of the manual transmission

To center the range with a 15 key, weaken the fasteners

The assistant gets the whole brunt of the centering work, it takes strength and dexterity

Repair and alignment of the dispensing unit should be carried out subject to experience and knowledge in the field of construction and repair of a specific transmission of four-wheel drive machines. It is necessary to center the demultiplier after each reinstallation. The correct position of the box is judged by the presence of vibration.

All off-road enthusiasts purchase all-wheel drive off-road vehicles to overcome various obstacles. Four-wheel drive is a system for distributing speed and power along two axles of the vehicle.Cars equipped with all-wheel drive have permanent all-wheel drive or plug-in. To ensure the transmission of angular speed to all wheels, a transfer case is installed in cars of this type. There will be a further article about her.

Almost every novice auto mechanic can repair the razdatka

The transfer case is the mechanism that distributes the torque from the engine to the drive mechanisms, that is, the differentials. Most often, the transfer case is used in off-road vehicles, as well as in some sports cars, which increases their stability on the road.

In SUVs, the transfer case performs the following functions:

Distributes the moment between the axles, which ensures the best cross-country ability of the car, and in this way the full potential of the engine is fully realized. The possibility of such a phenomenon as power circulation is automatically eliminated.
Increases torque to the drive wheels by using a downshift, this helps drivers overcome serious off-road obstacles.
Provides a stable position and movement of the car at low speed when all the torque is involved.

Transfer cases can be divided into several types:

Niva has excellent off-road potential, and that is why it becomes an indispensable assistant when going out into the wilderness. But, as with any car with a domestic SUV, problems can also occur.

Like any mechanism, the dispenser also fails, and by the following symptoms it can be easily determined:

Delays when turning on the front axle, turning it off abruptly. This situation can only happen in the case of early modifications with a demultiplier. All Niva cars have permanent four-wheel drive, but many craftsmen upgrade their cars, after which they have the opportunity to turn off the front axle.
Constant overheating under load. A possible reason will be a low oil level, if the reason is in it, then the oil must be added, if not, then this is caused by increased friction of the parts.
Increased oil consumption for the gearbox. The reason is any leakage due to wear of the oil seals, loose crankcase bolts, or simply not completely tightened the drain plug.
Looseness of the transfer case and gearbox mountings. Leads to strong vibrations in the passenger compartment. May be associated with fastening mechanisms or centering the transfer case.
Vibrations can also be caused by damaged transmission mounts, this issue is solved by simply replacing broken parts.
Looseness of the flange bolts, as well as its wear. It is solved by replacing or tightening the bolts, in the worst case - by purchasing an intermediate shaft. This breakdown leads to noise and vibration at first only when starting from a place of a car, later it turns into a constant hum at a speed of over 80 kilometers per hour.
Seized propeller shaft joints. Breakage occurs due to the drying out of the elements; in order to eliminate it, you will have to renew the lubricant with the help of a syringe. If the re-injection did not help, then you will have to replace the whole part.
Similarly, the CV joint can jam, this is either due to a lack of lubrication, or due to deformation. In case of severe wear, you will have to buy the entire intermediate shaft, if it was only a grease - you can simply replace it.
Cardan backlash is solved by replacing.
Differential wear can lead to noise and crackling when cornering, only replacing the differential will correct this cause.
Satellites and their obstructed movement often become a possible cause of cornering noise. This is due to burrs, which can be removed with a file.
Often, it is not the transfer case itself that fails, but the lever, rod and fork, which impede full control of the unit. Also, these parts can simply stick, for this they must be cleaned of dirt or, in case of severe wear, replaced.

You can learn about the new generation of Sobol 4x4 in this article.

Also see detailed information on how much powder painting of wheels costs.

There is nothing complicated in removing and repairing the demultiplier, this procedure can be carried out by any person who has the right tool. The main difficulty of this car is that the transfer case is not attached directly to the checkpoint itself, like in modern SUVs, in Niva they are connected by means of intermediate shafts.

The dismantling of the unit itself is quite simple; for this, the car is driven into the inspection pit. All levers in the passenger compartment are set to neutral. Then the plastic cover is removed from the tunnel and all covers and handles are removed. Then the hatch is unscrewed, which opens access to the distributor. The speedometer sensor is also removed, after which the driveshafts are disconnected. At the end, it remains to unscrew several fasteners of the box itself, and then remove it. After the mechanism is removed, you can proceed to disassemble it for further replacement of worn parts. In general, the installation is carried out in the reverse order, but it is worth paying attention to centering the transfer case with the gearbox, that is, it is necessary to convince the flange of the gearbox drive shaft to be connected to the transfer case intermediate shaft, after which you can tighten the mounting bolts of the range itself.

Niva has permanent four-wheel drive, and the car itself is inexpensive. And that is why, in terms of reliability and price, it is the best choice for outdoor enthusiasts. Maintenance of an all-wheel drive for this car will cost symbolic money, nevertheless, the very design of the mechanism has a fairly high reliability for such a price.

The transfer case on the VAZ 2121 "Niva" car and its modifications provides an angular transmission of speeds to all wheels. When the transfer case is connected, it connects the front and rear axles, distributing the torque equally. The presence of a crawler gear increases the torque at low speed, which is an undoubted advantage in off-road passage.

The "Niva" car has a serious potential for an off-road vehicle, but as practice shows, the transfer case often does not withstand the load and breaks down.

It is possible to determine the malfunction of the transfer case by the following symptoms:

long delay when connecting the front axle, as well as disconnecting it on its own;
overheating of the RCP at medium loads, the cause of which may be an insufficient oil level, or increased friction of parts;
oil drainage from the crankcase due to worn out oil seals and gaskets;
strong vibration in the passenger compartment due to worn out mountings for the transfer case;
hum at speeds over 80 km / h, as well as vibrations at low speeds due to loosening of the flange bolts, which leads to a complete replacement of the intermediate shaft;
worn cross-pieces of the propeller shaft due to insufficient lubrication in the bearings;
all kinds of malfunctions of CV joints and backlash of the propeller shaft;
the rod and fork of the transfer case often play, therefore it is difficult to engage the differential lock or low gear.

To remove the RCP, you will need a “13” wrench (open-end or ratchet), a flat and curly screwdriver. For convenience, the removal is carried out in the inspection pit.
In the salon, using a screwdriver, you need to remove the decorative trim for the levers. Under the cover there will be a boot of two shift levers, which is also removable.
The driveshafts are being dismantled. This is done using the key at “13”. The front and rear gimbals are disengaged in the same way. Before removing the shafts, mark the seat with the universal joint yoke so that after installation there is no vibration.
The speedometer cable is dismantled by unscrewing one nut and swiveled to the side.
Next, unscrew all the bolts securing the transfer case through the supports to the body and remove the RCP.

Full repairs will require an automotive tool kit and a transfer case repair kit (bearings, seals and gaskets, possibly some gears), a hammer, and a bearing puller.

Remove the front and back cover of the RCP body. To do this, you need to loosen the nuts securing the covers, and using a pry bar, pull the cover towards you from all sides. On the other side of the box, we do a similar operation. The front cover will come out with the shaft responsible for the differential lock, and the rear cover with the shaft responsible for the downshift.
Using a hammer, knock out the differential assembly from the case. The design of the differential inside the transfer case is similar to that found in the axles. Having unscrewed the nuts securing the main pair, we open access to the satellites. If there is wear on the teeth of the satellites, then we must change all the parts.
We check each bearing for abnormal sounds during rotation. If there are any, then we remove the nut of the shaft on which the bearing sits, and with the help of a puller we press out the old bearing.
In the reverse order, the internal parts of the transfer case are installed. It is recommended to use new bolts and nuts for sufficient torque of shafts and casing covers.
After assembly, fill in new semi-synthetic oil, not lower than GL-4 classification - 0.9 liters.

After any operations on the removal and installation of the transfer case, it must be centered. This will require:

loosen the attachment of the transfer case so that it “sits” more freely and can move slightly;
accelerate to a speed of 80 km / h, after which the razdatka will sit on its seats;
tightening occurs as soon as possible and with the engine running, so that by means of vibration, the RCP does not have time to take an unsuitable position.

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After such a repair, the transfer case can serve faithfully for a very long time. Unfortunately, the work of the transfer case under conditions of increased loads, often significantly affects the reduction of the resource, due to its weak design. To increase the reliability of the RCP, a subframe can be installed, which will allow the transfer case to be firmly placed in its place, as well as to exclude strong vibration from the transmission.

The ready-made subframe for "Niva" has ready-made holes and fasteners for attaching it to the body. Also, to increase reliability, an additional support for the transfer case is installed. To install the subframe, you will need to place a jack under the transfer case, loosen the mounting nuts and lower the transfer case. Next, the stretcher is fitted on the seats. I strongly recommend that the holes in the bottom be well lubricated to prevent possible corrosion. The subframe is screwed onto the transfer case, and the box itself is screwed onto the subframe. Due to the fact that the subframe is rigidly connected to the body, vibrations will still be transferred to the body, but not so significantly. Thanks to the reinforced bearings and high-quality rubber cushions, the transfer case will lose its tendency to leave the seat, which means that all elements of the chassis will last much longer.

It is quite easy to repair the transfer case of the Niva car. If you have at hand the necessary tool and minimal knowledge of the RCP device, then in a few hours your transfer case will heal a new life. Installing a subframe will eliminate many problems and prevent premature wear of all parts, assemblies and transmission units.

The transfer case on the Niva car is removed not so difficult. But it takes quite a lot of time, since in addition to the handout, some more details will have to be removed.

Below is a list of tools that will be needed to remove the transfer case on the Niva:

13 open-end wrench
13 spanner or ratchet wrench
Flat and Phillips screwdriver

First, it is necessary from the car interior, where the lock control levers are located, to remove the plastic cover on the floor tunnel, having previously unscrewed 4 self-tapping screws that secure it:

After that, you need to unscrew the three self-tapping screws that secure the cover under the levers:

And then we turn off the handles of the levers:

And now you can remove the cover under the control levers along with the rubber bands:

And also pay attention to the two wires that are connected. They can be clearly seen through the opening from the passenger compartment. They need to be disconnected:

We have nothing else to do in the car, now we need to either drive the Niva into the hole, or raise it on a jack and crawl under it, as I did.

To free the transfer case of the VAZ 2121, it is necessary to disconnect the cardans from it, both the front axle and the rear. And also disconnect the drive from the gearbox.

So, all cardan joints are disconnected in the same way, so I will show the result immediately after disconnecting the rear axle:

The front axle universal joint is disconnected in the same way. It is necessary to unscrew all the fastening nuts with a 13 key. If the bolts rotate, then you need to insert a flat screwdriver between the base and the bolt head itself:

To unscrew all the other nuts, we turn the cardan by hand for easier access to them. And now you can pull it off with your hand:

Next, take out the speedometer cable by simply unscrewing its locking nut by hand:

And we take it out by slightly pulling to the side:

After that, we disconnect the transfer case from the gearbox, also unscrewing a few bolts:

The final step in this instruction is to remove the transfer case from the outboards on each side.

But first, it is better to substitute something under the distributor so that it does not fall after removal.

It is most convenient to unscrew the outboard nuts with either a ratchet handle or a similar wrench. In this case, the Ombra ratchet wrench helped me a lot, a set of which I recently purchased:

When all the nuts are unscrewed, you can remove the transfer case from the car by gently lifting it down from the support you have prepared for it. You can cope on your own, even without outside help.

In case of replacement with a new one, you will have to fork out, since the price of a new handout for the Niva is about 15,000 rubles. It is not on sale in every city, so you will have to look for it. Or, as an option, look for a used one, but do not count on a very low price. You can't find a cheaper price than 5,000 rubles. Installation is carried out in the reverse order, but with an assistant to support it during replacement.

The relatively complex scheme of the distribution of torque from the internal combustion engine to the wheels is explained by the universal purpose of the Niva 2121 - with proper use, it is comfortable to move around in the city and along a muddy country road.
Similar properties are provided by the presence of a transfer case with a center differential lock, complementing the 4- or 5-speed "mechanics", depending on the year of manufacture. Lever located closer to the torpedo, is responsible for disabling / enabling the center differential, the second "Small" lever controls the range and has 3 positions: high and low rows, as well as neutral.

The transfer case mechanism includes more than 60 independent parts, which is confirmed by the presented drawing. Therefore, it is prudent to name the main elements and their purpose.

A pair of gears are tightly seated on the drive shaft, one of them (large) is designed for high gear, the second (small) is responsible for low gear. They have cut teeth with a straight and oblique profile. The first - in contact with the clutch, the second - with the intermediate shaft. The inclusion of one row or another sets in motion along the hub in the horizontal direction of the coupling, after which it connects to the gear on the drive shaft of the transfer case.

The intermediate position disconnects the box (reducer open), the movement of the car in this mode is impossible. The front helical gear on the intermediate shaft is used to control the differential.The engagement of the blocking, or rigid coupling of the shafts of the drives of both axles, is carried out through the coupling. The design is typical for modifications 21213 and 21214, the latter being additionally equipped with a speed sensor drive.

In the current state (when the transfer case is connected to the lower gear) the gear ratio in the first stage changes from 4.4 to 7.83, the second - from 2.52 to 4.58, the third - from 1.63 to 2.9, in the fourth - from 1.2 to 2.14, fifth - from 0.98 to 1.75, which is reflected in an increase in tractive effort on the wheels.

Normal position for RC grips to provide adequate road performance of good quality:

The inclusion of a special mode of operation of the transmission is made not long before the car begins to overcome an obstacle (track, mud, ford or rise). The transition to the lowest row must be performed while stopping. Returning to top gear is allowed on the go, although it causes problems for beginners due to the lack of the usual synchronizer.
It is somewhat more difficult to properly handle the forced manual center differential lock. On the contrary, it turns on with a small (up to 20 km / h) movement of the machine due to the mismatch of the slots on the blocking clutch, satellites and ring gear. For a simplified engagement of the lever in the desired position, taking into account the Niva 2121 dispenser device, pick up a low speed, then, shaking the steering wheel, pull the handle towards you.

Problems can also arise when disengaging the lock, since the clutch teeth literally mesh with the ring. Engage reverse gear and, swinging the steering wheel, push the lever away from you. This action is performed immediately after overcoming a difficult section in order to avoid overloading the checkpoint. It is most effective to turn off the differential together with the transition to lower stages. At the same time, only diagonal hanging of the wheels will be able to stop the Niva 4x4, since the standard cross-axle blocking is not provided.
Performing the listed operations, one should not give vent to physical strength. An attempt to "push through" the transmission is highly likely to result in costly repairs.

Severe exploitation, insufficient attention to how to use the distributor on the 2121 field, lead to the appearance of:

Body vibration in motion
Vibration at start
Gula
Noise when maneuvering
Tight inclusion of modes

Experience shows that the culprit is: insufficient oil level, incorrect centering of the RK, loosening of the mountings and damage to the rubber bands. An additional influence is exerted by the condition of the cardan and the engine itself.

Help please, I can’t find the Old, including the lowering lever on the lowered one, but there’s no point in the car stays on the high one before it was all right, I change the oil every 6 thousand km! Tell me if you can, what could be the reason?Today, in our workshop, tuning and repair of the Republic of Kazakhstan is carried out on cars of the Niva and Chevrolet-Niva families. Huge experience has been accumulated both in diagnostics of malfunctions of the RK and in the refinement of the mechanism itself as a whole.I will try to tell you in stages about the main problems of the RK and what can be improved or simply added to the existing unit, and I will make it as simple as possible so that everyone understands without going into clever technical terms, but I think it will not hurt to remember the device of the RK Niva: 1. It's no secret that the main problem with handouts in Niva is increased backlash on the drive shafts of the front / rear axle RK (you can easily find it by pulling them by the flanges) and this is a disease of the "constructive" RK, because Well, it's hard for the shafts to work on one support when it is still “sausage” by the cardan with poor balancing, and all this together gives decent vibrations that the driver feels with his backside while sitting in the car.We treat this differently after diagnosing the problem:- we replace worn parts (bearing or cover, or shafts, or flanges)-a can be modified by setting other covers RK (front / rear) for double-row bearings then.by increasing the area of the shaft support, we will reduce the backlash and significantly increase the service life of the pair (shaft / bearing), and the RK oil seals will become much better (they will leak less)-can be made even more correct, add a second support for the "output" shafts of the drive lane / rear bridge RK because for the normal operation of the shaft, exactly two supports are needed. This is done without removing or disassembling the RK by replacing the native flange of the RK with a modified one with its own additional bearing and oil seal. In the additional support, you can install bearings of both domestic production and foreign counterparts, say SKF.-Well, for gourmets we can offer installation of a double-row bearing in native caps RK with additional installation second shaft support from the side of the distributor flanges. 2 .Second problem or illness. All growers complain very much about “ snotty "oil seals RK ... Of course, this is influenced by the previous problem, but the quality of the oil seals themselves leaves much to be desired. And if we also add an illiterate installation of oil seals here, we will get a complete set. Treatment:-qualified installation of oil seals- installation quality oil seals or their foreign counterparts, say RK oil seals and gearboxes without rotation from Corteco or ERIKS. 3 .Third problem. The correct position of the transfer case relative to the checkpoint horizontally and vertically, i.e. it centering since and this greatly affects the vibration-free operation of the transmission. Treatment:set manually with the help of adjusting plates of the RK, achieving the minimum deviation of the axes of rotation of the KP, RK, RPM from each arc (they should be in parallel) the end of this work is the usual "old-fashioned centering" or it is also called "dynamic centering of the RK on rotating cardan shafts" True, we must honestly admit that such work takes up a lot of time and patience and does not always bring the desired result, especially on Nivov razdatki (for Sh / Niva this problem is less pronounced), therefore I propose for owners of Niv 2121-214 immediately install the RK subframe.In our workshop, you can consider several models of a subframe for the RK, which are installed as on a standard RK mount (without additional drilling of the car bottom)and the most often found in other workshops or in the markets (on the side members, slightly lowering the clearance).More detailed information about RK stretchers can be found in another article on this site in the "News" section or by clicking on the link: For those who do not want to contact us or live very far away or just like to tinker themselves, I provide drawings of the simplest stretcher for RK , having made which on your own you can try to get rid of vibrations, or at least move the Handout from the rotten floor to the side members if you have a very old and "tired" car.

And so it should look on the car

Perhaps I told all the main problems of the RK and how to take off to fight, it remains to add that you can still significantly expand the possibilities of your distribution if you have the desire and money. So . something else can be added and improved in the unit standing on your machine.

When preparing Niva for hunting and sports, we often install the following items in their transfer cases;
1.Synchronizer among the people "Synchro-Sport"

allowing you to switch between low and high gears without stopping the car completely. RK this is the same checkpoint only it is not provided for by the plant synchromes;
2. Shut-off clutch front axle, adding one more
the position of the handle, thanks to which the Niva can become much more economical in
fuel consumption when driving on asphalt roads, and also appeared
the ability to turn on / off the differential lock on the go and the ability
more comfortable driving with the self-block installed in the front
reducer;

3.Install lower row of RK with coeff. 1: 3 , thus we increase the power at the bottom by almost 40%;

4.install transfer case shift knobs on "tuning" (assembled according to the type of gearbox handle), which made it possible to remove the metal itching when
work of handouts

5. Install tuning breather Sometimes we equip it with a separate filter to drain the dispenser drainage under the hood during hydraulic conditioning of the RK.

6.And the last "trick" in tuning RK can be considered the installation electric dispensers ,

Of course, such an option is for gourmets who are trying by all means to increase the noiselessness of the Niva units. allows you to remove unnecessary handles in the car.

Who is interested, call, we will repair or modernize and give you a handout according to your needs and based on the already existing technical training of your car!

Transfer case drive

Details of the drive and intermediate shafts

Transfer Case Differential Parts

1. Flush transfer case and drain oil.
2. Mount the transfer case to a disassembly stand and loosen the flange nuts on the drive shaft and on the front and rear axle drive shafts.

15. Unscrew the bolts of fastening of the driven gear wheel of the differential, mark with risks on the differential cases their relative position relative to each other and separate the case.
16. Remove the differential driven gear.
17. Remove the circlips 8 and the spring washer 14, then press out the pinion axle and remove the satellites and pinions of the drive axle drive with support washers (see Fig. Transfer case differential parts).
18. Press out worn or damaged oil seals from the front axle drive housing, from the front bearing cover and from the rear cover.
19. Unscrew the nuts from the suspension cushion axles and remove the complete brackets.

1. Assembling the transfer case is carried out in the reverse order of disassembly.
2. Assemble the center differential, aligning the marks on its housings, so as not to upset the balance of this unit.
3. Install the spring washer on the satellites axle from the side of the blind hole on the axle end.
4. The axial clearance of each axle drive gear should be 0–0.10 mm, and the torque of resistance to rotation of the gears should not exceed 14.7 N · m (1.5 kgf · m).
5. With an increased gap, replace the support washers with others, of a greater thickness; if the specified clearance cannot be obtained when installing the support washers of the greatest thickness, replace the gears with new ones due to their excessive wear.

Cars of the Niva family differ from VAZ cars by permanent all-wheel drive - they have two driving axles. In total, the transmission of the VAZ SUV has three differentials - one for each axle and another center differential.

The transfer case "Niva" is designed to distribute traction forces between the axles, and works on the principle of a 2-speed gearbox.

The distribution box is not present in all VAZ cars, but only on cars with two drive axles. In the transmission, the transfer case (RK) is installed behind the gearbox; the rear propeller shaft is attached to its shank, which connects the transfer case to the rear axle. The front axle is also driven by the RK, it is connected to the transfer case by the front propeller shaft.

The reduction gear in the RK is designed to obtain high torque, it is used to overcome difficult road sections, helps to cope with off-road conditions. The VAZ Niva transfer case contains the following main parts:

the body itself;
front axle drive shaft;
intermediate shaft;
drive shaft;
gears;
bearings;
differential housing;
satellites;
differential lock clutch;
gear shift clutch;
flanges (for connection with cardan shafts);
oil seals;
control levers.

The VAZ-21213 model is an off-road passenger car with permanent all-wheel drive and differential lock. Brand 21213 is a restyled version of the first VAZ SUV VAZ-2121. RK Niva 21213 has three gears:

the first - with a gear ratio of 1.2;
the second, reduced - with a number of 2.135;
neutral.

21213 is equipped with 4-speed and 5-speed gearboxes, and when the first speed of the transfer case is on, the car works in standard mode, the gear ratios in the transmission are from 5-speed. The checkpoints are as follows:

When you turn on the second position of the transfer case lever (reverse position), the gear ratios change (decrease):

On normal roads, the first gear is constantly engaged on the transfer case, the transfer case control lever (reduction gear) is pushed forward. The neutral transmission of the RK disconnects the transmission, and in this position the car does not drive, there is also neutral in the checkpoint.

Often motorists ask the question - why do we need a neutral gear in the transfer case. Neutral is used when connecting additional units to the transmission, for example, a mechanical winch, in which case a power take-off must also be installed.

On Niva cars (with the exception of Chevrolet Niva), two main types of transfer cases are used:

21213 (modifications 21213-1800020-01 and 21213-1800020-02):
21214 (modifications 21214-1800020-01, 21214-1800020-02, 21214-1800020-10).

Between themselves, the transfer case has almost the same design - on the RK 21214 there is additionally a speed sensor drive.

The distributor of the VAZ 2123 car basically has the same device as the node 21213/21214, but the Chevy Niva has:

different control mechanism (with one lever);
an additional support is installed (on a simple Niva, the RK is mounted on two supports, on a VAZ 2123 car - on three supports).

The distribution box on the Niva is a fairly reliable unit, repair problems in the mechanism itself arise mainly due to the insufficient oil level in the RK - if for some reason the oil has leaked out, intensive wear of all parts occurs. Among the frequently occurring malfunctions are:

vibration on the body at different speeds when driving a car;
vibration at the moment of starting a car from a place;
noise in the transfer case when the car is slipping or entering a turn;
tight inclusion of a higher or lower gear, difficult engagement of the lock.

Vibration in the body is the main "disease" of the Niva, it often arises from the wrong centering of the transfer case. Most often, vibration occurs on VAZ 21213/21214 cars, since the RK is mounted only on two supports on the sides of the body, on the Chevrolet Niva the transfer case is already installed on three supports. But before you start adjusting the position of the transfer case, you should check the condition of other parts of the chassis - vibration may also occur for other reasons:

cardan shafts are poorly fixed;
wheels are not balanced;
there is a backlash in the driveshaft crosspieces (especially the backlash in the rear driveshaft crosspieces affects vibration);
vibration comes from the engine itself.

Vibration when starting off on the Niva can also occur for the following reasons:

the fastening of the installation supports of the distributor was unrolled;
the rubber on the RK supports themselves broke.

Correct installation of the transfer case can be done in several ways. Most often, in auto repair shops, repairmen use the following method:

hang the car on a lift;
weaken the fastening of the hand-out;
start the engine;
turn on the transmission and accelerate the car according to the speedometer to the speed at which vibration occurs (it often occurs at speeds from 40 to 80 km / h);
without applying the brakes, they extinguish the speed with the engine, then turn off the ignition.

The distributor itself is centered in places, it remains only to tighten the fasteners of the supports.

You can also adjust the position of the RK using a wire, we do it as follows:

we loosen all four fasteners of the razdatka supports;
we fix one end of the wire to the rubber coupling of the propeller shaft;
we also attach a piece of wire to the CV joint, bring the other ends of the wire to each other;
we rotate the shaft, if the distributor is not centered, the ends of the wire will diverge during rotation;
the task is to install the transfer case using the selection method so that the ends of the wire practically do not diverge from each other in any position when turning the shaft.

The installation of the third support of the RK on VAZ 21213/21214 cars allows to reduce the level of vibration of the transfer case, with this support it is easier to center the transfer case. The part can be purchased at auto dealerships or you can make it yourself. The finished product comes with three long studs (for model 2121); to install the third support on this machine, you will need to unscrew the short studs from the transfer case and install new studs from the kit. We make repairs as follows:

dismantle the front passenger seat in the cabin;
remove the lining of the floor tunnel;
in the cabin, move aside the carpet covering the body amplifier (in front of the handbrake lever);
we remove the transfer case (as an option, you can simply hang it out, but after removing the installation of the third support it is more convenient to do it);
we attach a new support bracket to the RK body;
install the transfer case in place, center it in the optimal position, attach the side supports;
we combine the third support with the body, we drill two holes in the bottom;
using washers, bolts and nuts (included in the kit), we attach the support to the bottom of the body.

Vibration is more effectively eliminated by installing a stretcher under the dispenser. You can also make such a device yourself or buy a finished product at a car shop.

In order to install the subframe, the transfer case must be removed. It is more convenient to carry out such work in a pit, we carry out repairs as follows:

we leave the car in neutral;
we disconnect the propeller shaft from the distributor, it is advisable to mark the flange of the propeller shaft and the PK so that during installation, install the propeller shaft according to the marks - this way, the appearance of unnecessary vibrations is excluded;
dismantle the muffler mounting bracket;
remove the traverse of the checkpoint;
jack up the distributor, remove the side mounts of the RK;
we process the landing sites of the stretcher to the body with Movil;
we put the stretcher on the gearbox studs;
mark the attachment points of the subframe on the side members, drill holes, bait the bolts on the body;
we tighten all fasteners, except for the razdatka supports themselves;
we make the alignment of the RK;
finally tighten the transfer case supports.

It should be noted that the installation of an additional support or subframe on the RK does not always lead to the desired effect, in some cases the vibration only increases.

To repair the transfer case on a VAZ 21213 (21214) car, the assembly must first be removed. Removal is performed in the following order:

in the cabin we dismantle the plastic trim for the gearbox and gearbox levers;
we turn off the knobs of the transfer case shift levers, remove the casing under them;
we disconnect the speedometer cable, for RK 21214 it will be necessary to disconnect an additional speed sensor;
we unfold the bolts with nuts securing the elastic coupling of the front and rear propeller shafts, in order to remove the bolts, the propeller shafts must be turned - they are removed one at a time in one specific shaft position;
we install a jack (or other stop) under the distributor, mark the places where the side supports of the RK were attached. This is done in order to minimize the centering of the transfer case during installation;
we unscrew 4 nuts securing the RK to the gearbox;
unscrew 4 fasteners of the RK supports to the car body;
now all that remains is to dismantle the transfer case.