Despite the fact that Shniva has truly become a “people's favorite,” she is not without her shortcomings, which are almost impossible to eradicate. Many car enthusiasts are well aware of them and are trying in every possible way to fight them. This article is devoted to such a disadvantage as Chevrolet Niva vibration, which occurs at a certain speed or at certain engine speeds. If the cause is not eliminated, vibration, in addition to discomfort, will negatively affect the bearings of the transfer case or even axles.
Who is to blame and what to do?
I think that the first question is rhetorical))) But let’s try to answer at least “why this is so.”
I am a mechanical engineer by education and work, production technology is at an average level, so I turned to a military plant technologist for advice. How it should be: the workpiece is made with a press, rough processing is carried out with allowances, a thermal treatment is made, the part is processed completely according to the “main and landing” dimensions. How it was done: the last stage was removed. The answer to the second question. We buy a box at the factory containing 100 “semi-finished” flanges wrapped in oil paper, drag them to the lathe, set up the “finishing fixture” and finish the entire batch.
Chevrolet Niva
Here you need to take into account that the transfer case of the VAZ-2123 car, which the Niva actually is, has exactly the same device as similar units on an ordinary VAZ SUV.
But the Chevrolet Niva, as you know, has a different control mechanism - it uses a single transfer case lever, not two. Gears are switched lengthwise, and the locking is switched across. At the same time, it was initially installed with a different clutch (Valeo) and small-module RK with single-row or double-row bearings.
So, regarding the discussion on the topic “the causes of vibration and howling in the transfer case on a Chevrolet Niva and how to eliminate it?” The advice we gave above is quite appropriate.
Vibration Niva Chevrolet causes and diagnosis
Vibration Niva Chevrolet - causes and diagnostics, we look for defects and check the weakest points of the Shniva. Almost all owners of this model face this problem - it is, so to speak, a congenital drawback. Vibration mainly appears due to play in the cardan shafts, for example, when releasing the gas - this is most likely a loose rear crosspiece. If an unpleasant phenomenon is observed at 60-40-80 km/h, the front driveshaft or front cross member may be to blame. At high speeds, vibration is often also caused by the death of the cardan and crosspieces, although on other machines it usually disappears with such a breakdown. Another reason is in the transfer case, see the centering ring and elastic coupling, seals. If we look at the number of calls to service, then the universal joints are to blame for 80%, the transfer case for 10%, and other cases for another 5%.
To fix the problem, many people replace driveshafts with crosspieces with similar ones with CV joints. The ride will be much quieter, if, of course, the shaft is good, balanced and free of defects. By the way, it also happens that the problem gets worse with replacement - but there’s nothing you can do about it, such is the quality of the spare parts. It should be noted that it is almost impossible to completely overcome the vibration problem of the Chevrolet Niva. Craftsmen build a bracket under the transfer case from profiles, placing it through the pillows also helps to partially cope with the problem.
For other problems, look at the wheels, which may be misaligned. Typically, diagnostics begin after balancing the wheels at a tire shop. If it vibrates at idle, there may be something wrong with the engine, you need to look at the power system, drive belts, generator, pump, pulleys - they can make an unpleasant sound. Also, some body hardware may vibrate, for example, a hood holder (rack).
Vibrations in the field, prologue
Introduction to history. In the team of people with whom I work, there are quite a lot of people with different characters, education and astrology)) What I mean is that “Virgo” is “VIRGO”. And either you understand this, or kill him right away. For example: when this person had problems with the gearbox and he decided to bring it “to mind” and go through it, he did it FIVE TIMES.
Sometimes during disassembly, changing one bearing that he didn’t like, for one reason known to him))) And this person suggested that I look for vibrations, because the box had been rebuilt 5 times, the transfer case 10, and even the “hammer and sickle” CV joint driveshafts were taken for additional balancing.
I won’t tell you what it looked like sometimes. But Gaidai could have made another one of his brilliant comedies. We didn’t get too clever, but simply used the experience of the farmers to confirm or refute this knowledge.
The transfer case shakes in the field when starting off
Please tell me what the reason is. After I crashed a little into the heating line (the sprocket hit the floor of the windshield, it cracked), I backed up and something cracked, and I quietly drove home. The next day I drove a couple of kilometers off-road. After that, when I started to move away in 1st gear, my teeth almost fell out from the shaking, there was a very strong vibration of the transfer case up and down, as if the whole gearbox was about to come out. What is the reason and where to go to fix this problem.
Thanks in advance to everyone who answers.
how he crashed into the front bumper (even the rear bumper was also bent inward).
Where is it located and what is it like?
I probably would have done it differently. I unscrewed the front cover of the front axle housing and visually checked the condition. Half an hour's work.
The procedure is not pleasant (the oil must be drained), and besides, you can only see obvious damage.
To begin with, it’s better to twist everything so that it can spin without disassembling. It will take no more time, but we will check not only the bridge, but also the transfer case and axle shafts.
Maybe a person forgot that the transfer case has 3 lever positions, low-neutral-high, and switches between low and neutral
Thanks everyone for the answers. Now I took 21213 without the engine. And from 2121 to 21213 I moved the engine and gearbox, the transfer case is new. 4 days of repairs and today it started smoking, although the temperature rose very quickly. Tomorrow I will change the pump
.
And the front end really died, most likely the gearbox.
Thank you all so much again.
Yes, for sure, I will change the generator, because it is original from 2121.
What is the easiest way to bleed air from the cooling system? The antifreeze in the radiator does not heat up even an ounce. And the temperature rises to 110 in 5 minutes
That's it, I drove for about 1 km and the plug in the cooling system apparently broke, the temperature is stable at 90. All that remains is to change the generator.
And also, when I did a test drive, the car began to stall when switching from 2nd to 1st gear, while jerking, and while driving it also jerks when you release the gas pedal. And as if the car itself wants to accelerate, you squeeze the gas and it stops twitching. It jerks at low speeds, but not at high speeds. Seems to be clearly explained
Source
Vibration and how to deal with it.
The main reason for the occurrence of unnecessary sounds is multi-frequency vibrations of the components of the transmission. In general, the vibration of the transfer case on a Niva is one of the most common cornerstones that other car owners are forced to fight (or put up with) constantly.
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