It is never pleasing to listen to a sound on your automobile that you don’t know where it comes from. You may be thinking what to do when you identify a reversing gear noise that persists on your Mercedes Classe A 3? Any gearbox problem can be serious, but before making sure, it is better to do a few investigations. Our team has written this content page to support you solve it. First, we will see what the origins and the different gearbox noises can be on Mercedes Classe A 3, and second, what are the solutions available to you.
Classical reverse Mercedes Classe A 3 noises and some tips to maintain your gearbox
Why does the reversing of my Mercedes Classe A 3 make a different noise from my other speeds?
De facto, adding all gears, bearings and pinions into a gearbox is a difficult exercise. The noise created by the reversing of your Mercedes Classe A 3 is logical. It can be explained in a fairly simple way. In fact, the gears used for conventional speeds (1st to 5th or 6th) are so-called “helical” gears (oblique gears) . The use of such a pinion makes the noise caused by the gears less important than with spur gears implemented for the reverse gear.
Tips to limit wear on your clutch and gearbox
- Don’t give a big boost:
Indeed, if you kick the throttle hard when you are in reverse or when you put the automobile in the revs, you risk to burn your clutch or gnawing at the gearbox pinions. - Never reverse while the automobile is in motion or vice versa:
Reversing the direction of operation of the gearbox during operation is a very bad practice. In fact, the pressure you will put in on the gears will be significant and you will generate a premature wear and tear of the gears. You can even destroy the gears of your gearbox at speed by doing so. It will therefore be completely normal if you find out a reverse noise on your Mercedes Classe A 3 if you shift gear under these conditions.
Diverse Mercedes Classe A 3 reversing noises and their origins
Finally in this section, we will move on to what you are probably most excited about in this page, to find out about the cause of reversing noise on Mercedes Classe A 3. Here are the 3 typical noises you may be victim of.
I find out a grinding noise when starting in reverse gear
If you listen to a grinding noise when you start in reverse with your Mercedes Classe A 3, it may be the engine mounts that are tired. Indeed, when the engine is in reverse gear, due to the pinions we saw above the vibrations produced by the gearbox are higher and it is therefore possible that due to their wear the silentblocks no longer absorb the engine vibrations well. In this case, do not hesitate to check out this article for more info about strut mount noises on Mercedes Classe A 3.
An increased reverse knocking noise on Mercedes Classe A 3X
If you are subject to a knocking noise when you are in reverse with your Mercedes Classe A 3 and this noise tends to build up as you gain speed. It is possible that you are dealing with a serious problem that needs to be fixed quickly before ruining your entire gearbox. In fact, an intensifying rattling noise means that the gears are damaged. If they are, debris will spread to the rest of the box and damage other gears quickly. Take your automobile to your technician quickly or browse this content about gearbox noise on Mercedes Classe A 3 for more information.
I find out a noise when I go in reverse
Hearing a noise when you shift into reverse is normal and related to the gears and sprockets used in the gearbox. If, on the other hand, you have the feeling that your Mercedes Classe A 3 reverse gear makes more noise than before, it is possible that filings have been made and are moving around in it. It is therefore time to empty the box.
