How to check the gearbox?

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How to check the gearbox?

When buying a car from the hands or in the cabin, you need to be able to determine whether its main components and systems are operational. In addition to the engine and brake system, it is, of course, the gearbox of your car. Talk about how to check the gearbox. Let's start with the mechanical (manual transmission), and then describe the process of checking the automatic transmission (automatic transmission).

How to check the manual transmission

First of all, check if the gears are good. The inclusion should occur without additional effort, easily and smoothly, while there should not be heard any extraneous sounds: rattling, knocking, cod. If you hear such sounds, trying to “stick” this or that gear, it means that the manual transmission is faulty and needs repair. I had a case where the box worked perfectly, and I decided to give my friend a go-ahead for the purchase, but still, just in case, I decided to check again how the rear gear is turned on by car. And her instincts did not let her down: if for the first time she stuck with a little pressure, then in the second she refused to turn on at all.

The problem had to be solved like this: put the manual transmission lever in the neutral position, releasing the clutch, then squeeze the clutch again and try to engage the reverse gear. It is clear that when maneuvering it takes enough time and is extremely inconvenient.

Next, I would like to draw your attention to the fact that the included programs in no case should not “fly out”. What does it mean? After you have switched on this or that gear, some time after the start (continuation) of the movement, you suddenly notice that the gear shift lever has returned to the neutral position. On a serviceable manual transmission, such a “loss of gears” should in no case occur.

Finally, pay attention to the condition and amount of oil in the manual transmission. The condition of the oil should be such that there should not be any foreign inclusions (particles or even individual items).

I talked about the initial test, which will help you identify obvious irregularities, if any. Of course, there may be some minor defects in the gearbox, which can only be identified by specialists using the appropriate equipment.However, as a rule, primary inspection is enough to avoid problems with manual transmission in the next 2-3 years (of course, with proper operation). Well, now let's talk about the automatic box - automatic transmission.

How to check the automatic transmission

As for the automatic transmission, it is best to start here by checking the oil in the box. First of all, pay attention to the color of the oil: the new one is red and the old one is brown. If the oil is almost black, then it means that it has not changed for a very long time and the previous owner did not follow the car badly. Also pay attention to the oil level in the automatic transmission. Then do not be lazy to take a ride on the car and see how the various gears on the box behave - if there are any hitches when turned on, jolts, other sounds.

Shocks and noises indicate that there are some malfunctions in the automatic transmission. Particularly worth guarding when when you choose one or another program heard blows - this indicates a fairly strong wear automatic transmission, and in this case should think about finding another car to buy. However, I would not recommend you to buy a car even when minor defects are found.Especially it concerns those cases when the new owner plans to exploit the vehicle quite intensively - minor defects tend to imperceptibly turn into major breakdowns, the elimination of which will require quite substantial financial investments.

Additional tips

Then I would like to say more about this: even if you tested the gearbox (no matter, manual transmission or automatic transmission) and did not notice anything suspicious, I advise you to check it in and with a well-warmed engine, as some faults manifest themselves only after some that time. And again: do not believe the seller, who assures you that the individual noises are a distinctive feature of a particular model. Remember: a serviceable transmission in any (I emphasize - any) car should work smoothly, without the slightest jolts and extraneous sounds.

And finally, I advise you to read our other articles on this topic.

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