It is never pleasing to discover a sound on your vehicle that you don’t know where it comes from. You may be wanting to know what to do when you identify a reversing gear noise that lasts on your Mercedes A class? Any gearbox trouble can be critical, but before making sure, it is better to do a few checks. Our team has written this content page to support you resolve it. First, we will see what the sources and the different gearbox noises can be on Mercedes A class, and second, what are the solutions available to you.
Classical reverse Mercedes A class noises and some tips to preserve your gearbox
Why does the reversing of my Mercedes A class 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 caused by the reversing of your Mercedes A class is logical. It can be explained in a fairly simple way. Indeed, 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 much less important than with spur gears employed for the reverse gear.
Tips to limit wear on your clutch and gearbox
- Don’t give a big boost:
In fact, if you kick the throttle hard when you are in reverse or when you put the vehicle in the revs, you risk to burn your clutch or gnawing at the gearbox pinions. - Never reverse while the vehicle is in motion or vice versa:
Reversing the direction of operation of the gearbox during operation is a very bad idea. Indeed, the pressure you will put in on the gears will be monumental and you will generate a premature wear and tear of the gears. You can even break the gears of your gearbox at speed by doing so. It will therefore be completely normal if you listen to a reverse noise on your Mercedes A class if you shift gear under these conditions.
Different Mercedes A class reversing noises and their causes
Finally in this section, we will move on to what you are probably most curious about in this page, to learn about the origin of reversing noise on Mercedes A class. Here are the 3 typical noises you may be victim of.
I notice a grinding noise when starting in reverse gear
If you discover a grinding noise when you start in reverse with your Mercedes A class, 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 conceivable that due to their wear the silentblocks no longer absorb the engine vibrations well. In this situation, do not hesitate to read this document for more information about strut mount noises on Mercedes A class.
An increased reverse knocking noise on Mercedes A classX
If you are subject to a knocking noise when you are in reverse with your Mercedes A class and this noise tends to increase as you gain speed. It is conceivable that you are confronting a serious trouble that needs to be resolved fairly quickly before destroying your entire gearbox. Indeed, an intensifying rattling noise means that the gears are damaged. If they are, debris will disperse to the rest of the box and damage other gears before long. Take your vehicle to your auto mechanic quickly or read this content about gearbox noise on Mercedes A class for more information.
I perceive a noise when I go in reverse
Experiencing a noise when you shift into reverse is normal and relating to the gears and sprockets used in the gearbox. If, on the other hand, you have the feeling that your Mercedes A class reverse gear makes more noise than before, it is conceivable that filings have been created and are moving around in it. It is therefore time to empty the box.
