Oil change box spark changes

Greetings. I have a 2005 Chevrolet Spark. For some semasna, you have to do a lot of pressure so that it enters into reverse and on a few occasions another cmabio. I have been told that maintenance is needed in the gearbox, which implies oil. Is this a serious problem? What should I do? thank you.

It is not as serious as it seems, but the oil level in the box does not have much to do, because if this were the problem you would cost you all the marches and not only the reverse, now it is as very soon for your box to be bad or damaged, but it is not uncomposable, what I recommend is to take out the oil and verify that there are no metal particles, the plug of the box is magnetisted, so it would be easy to see if it will be easy to see if it will be easy to see if it will be easy to see if it will be easy to see if it will be easy I have a yaris and the reverse reverse offset if the spark happens to the same.