How does a crunching sound manifest in a gearbox?
There is an unspoken rule among drivers - to start driving a car with the radio turned off. This is necessary to immediately check whether there are any extraneous knocks, noises or other sounds that may indicate a malfunction of a particular unit. The following sounds will indicate problems with the gearbox:
- A crunching sound when engaging a gear, and often it can only appear in one of the gears, for example, in reverse;
- Crackling noise when returning the gearshift lever to neutral.
If you notice one or both of the symptoms in the operation of your box, you should determine and eliminate the cause as soon as possible.
What to do
To avoid expensive repairs, it is necessary to correctly diagnose the breakdown. If the problem is still in the gearbox, it should be addressed urgently.
Provided that your car has a manual transmission, you can carry out repairs yourself, based on the car’s operating instructions.
If you have a “robot” or “automatic”, it is better to leave diagnostics and repairs to the car service specialists. Improper intervention threatens to replace the entire gearbox, and the price for such gearboxes is much higher than for manual transmissions.
Why does the gearbox crunch?
There are many reasons why a crunching noise occurs when the gearbox operates. Eliminating some of them does not require much intervention in the mechanism, while others require a near-overhaul of the box. Most often, the gearbox crunches when changing gears for the following reasons:
Synchronizer malfunction. The problem may lie either in the failure of the element or in the insufficient amount of lubricant in the part. If the synchronizer has “crumbled” due to age, the lubricating components with the resulting “garbage” risk causing serious damage to the entire unit, so the situation needs to be corrected as soon as possible;
What causes grinding noise in automatic transmissions and automatic transmissions?
It is a rare occurrence when the automatic transmission on a Kalina begins to make extraneous noise. The reason may be untimely replacement of transmission oil when its viscosity decreases. The layer applied to the rubbing surfaces becomes smaller, and lubrication becomes worse. It is recommended to change the oil every 60-70 thousand km.
Noise in an automatic transmission can come from worn bearings and gears.
The Jatco company (it was from this manufacturer that automatic machines were installed on the Kalina) stated that the service life of the box before major overhaul is 250 thousand km.
If you are close to these numbers, then it is best to take the car to a technical inspection station, where they will conduct a full diagnosis of the gearbox.
In the case of an AMT (automated gearbox), an extraneous grinding and squeaking noise can be produced by the clutch actuator. Most Lada Kalina owners recommend removing and disassembling the unit. If the lubricant has dried out, it needs to be renewed: this is what causes squeaks. Be careful with the spring that is located in the actuator: it is charged with great force.
Clutch Actuator
Also inspect the actuator housing and the spare parts located inside it. They must be without visible mechanical damage.
How to avoid crunching noises in the gearbox
Most often, gearbox malfunction occurs due to improper care of it. Manual transmissions require regular lubrication, which drivers often forget about, assuming that such procedures are only required for automatic transmissions. If the lubricant loses its properties, this can lead to serious consequences, including failure of individual components and mechanisms.
Experts recommend replacing the lubricant in a manual transmission every 45-50 thousand kilometers. If the vehicle is driven under particularly severe conditions, change the oil more often.
Please note: It is especially important to promptly change the lubricant on a front-wheel drive vehicle.
By lubricating gearbox and suspension elements in a timely manner, you can avoid expensive repairs and early failure.
Hello everyone. The second gear shifts with a crunch. I know it's synchronous. Tell me, how much does a synchronous replacement cost and how long can you drive?
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Video “How to solve the problem of poor gear shifting?”
The Avto-Blogger channel made a video that describes all the nuances of poor gearing in a car when the engine is running and gives recommendations for solving such a malfunction.
I've read a lot about this in the last hour and am confused about what needs to be done. And my situation is the following, I squeeze the clutch, the speed is tight... but it turns on (but very hard) with the second one in the same way, I also remember the words of the master at 15 thousand like turn it on through the second one), so now it’s not possible to turn it on through the second one, well, if it does to overcome this tight inclusion, then the subsequent times 1st and 2nd come in so that it breaks into a smile (very easily), there used to be moments when if you switched super sharply there was a crunch, for example from 1st to 2nd, but somehow I got used to it and everything went away, oil in korobos it is replaced by semi-synthetics.
Failures that cause crunching when changing gears
Crunching noise when shifting gears can be caused by several factors. The first and, admittedly, most popular is considered to be the breakdown of any unit, and the crunch in this case is only a symptom. Among the main breakdowns that cause such unpleasant sounds when switching gears are: 1. Failure of synchronizers . Synchronizers are responsible for smooth gear shifting. Over time, they wear out and cause a crunching sound when changing gears. Fixing the problem is quite easy - you need to replace these same synchronizers. However, only professionals should be trusted to carry out this type of repair. 2. The falling out of the clutch basket can also cause a crunching sound when changing gears. Replacing the clutch basket will eliminate this defect. 3. Clutch malfunction . Well, here words are superfluous - go for diagnostics, they will establish an accurate diagnosis. 4. Problems related to the gearbox shaft . The problem can be solved by replacing this unit.
Second gear slips out on Priora
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There were problems with 2nd gear initially, from the moment of purchasing this Lada Priora. Well, how can I say the problem - at first it didn’t turn on at all, then it started turning on with a crunch (we’re talking about a quick start and switching from 1st to 2nd at 6000-6500 rpm, there were no problems during normal driving). I got there :) The second gear began to fly out, and it was impossible to hold it in place even if I held it tightly with my hand - the car jerked violently and did not want to go. I drove almost like in a video recording of one of the blogs of a well-known person - 1-3-5 DAL GONE
