It is never pleasing to hear a sound on your car that you don’t know where it comes from. You may be questioning what to do when you detect a reversing gear noise that continues on your Mercedes Classe M? Any gearbox trouble can be severe, but before making sure, it is better to do a few checks. Our team has created this content page to support you fix it. First, we will see what the origins and the different gearbox noises can be on Mercedes Classe M, and second, what are the solutions available to you.
Classical reverse Mercedes Classe M noises and some tips to protect your gearbox
Why does the reversing of my Mercedes Classe M make a different noise from my other speeds?
De facto, integrating all gears, bearings and pinions into a gearbox is a difficult exercise. The sound caused by the reversing of your Mercedes Classe M 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 chosen for the reverse gear.
Tips to limit wear on your clutch and gearbox
- Don’t give a big boost:
Certainly, if you kick the throttle hard when you are in reverse or when you put the car in the revs, you risk to burn your clutch or gnawing at the gearbox pinions. - Never reverse while the car is in motion or vice versa:
Reversing the direction of operation of the gearbox during operation is a very bad plan. In fact, the pressure you will put in on the gears will be enormous and you will make 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 notice a reverse noise on your Mercedes Classe M if you shift gear under these conditions.
Several Mercedes Classe M reversing noises and their origins
Finally in this section, we will move on to what you are probably most interested in this article, to find out about the cause of reversing noise on Mercedes Classe M. Here are the 3 typical sounds you may be victim of.
I hear a grinding noise when starting in reverse gear
If you hear a grinding noise when you start in reverse with your Mercedes Classe M, it may be the engine mounts that are tired. In fact, 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 circumstance, do not hesitate to read this content for more information about strut mount noises on Mercedes Classe M.
An increased reverse knocking noise on Mercedes Classe MX
If you are subject to a knocking noise when you are in reverse with your Mercedes Classe M and this noise tends to amplify as you gain speed. It is possible that you are dealing with a serious trouble that needs to be resolved rather quickly before ruining your entire gearbox. In fact, 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 in short order. Take your car to your auto mechanic quickly or browse this article about gearbox noise on Mercedes Classe M for more details.
I find out a noise when I go in reverse
Hearing a noise when you shift into reverse is normal and linked to the gears and sprockets used in the gearbox. If, on the other hand, you have the feeling that your Mercedes Classe M reverse gear makes more noise than before, it is possible that filings have been created and are moving around in it. It is therefore time to empty the box.
