It is never pleasing to perceive a sound on your automobile that you don’t know where it comes from. You may be questioning what to do when you detect a reversing gear noise that remains on your Bmw Serie 3 E90? Any gearbox problem can be serious, but before making sure, it is better to do a few inspections. Our team has written this document to help you eliminate it. First, we will see what the origins and the different gearbox noises can be on Bmw Serie 3 E90, and second, what are the solutions available to you.
Classical reverse Bmw Serie 3 E90 noises and some tips to look after your gearbox
Why does the reversing of my Bmw Serie 3 E90 make a different noise from my other speeds?
De facto, adding all gears, bearings and pinions into a gearbox is a difficult task. The sound caused by the reversing of your Bmw Serie 3 E90 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 less strong than with spur gears chosen for the reverse gear.
Tips to reduce 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 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 choice. Indeed, the pressure you will apply on the gears will be enormous and you will develop 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 experience a reverse noise on your Bmw Serie 3 E90 if you shift gear under these conditions.
Diverse Bmw Serie 3 E90 reversing noises and their triggers
Finally in this section, we will move on to what you are probably most enthusiastic about in this content, to find out about the source of reversing noise on Bmw Serie 3 E90. Here are the 3 typical noises you may be victim of.
I listen to a grinding noise when starting in reverse gear
If you perceive a grinding noise when you start in reverse with your Bmw Serie 3 E90, 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 plausible that due to their wear the silentblocks no longer absorb the engine vibrations well. In this situation, do not hesitate to consult this content for more details about strut mount noises on Bmw Serie 3 E90.
An increased reverse knocking noise on Bmw Serie 3 E90X
If you are subject to a knocking noise when you are in reverse with your Bmw Serie 3 E90 and this noise tends to increase as you gain speed. It is plausible that you are confronting a serious problem that needs to be fixed very fast before wrecking your entire gearbox. Indeed, 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 very fast. Take your automobile to your repair shop quickly or browse this article about gearbox noise on Bmw Serie 3 E90 for more details.
I perceive a noise when I go in reverse
Hearing 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 Bmw Serie 3 E90 reverse gear makes more noise than before, it is plausible that filings have been produced and are moving around in it. It is therefore time to empty the box.
