It is never enjoyable to discover a sound on your car that you don’t know where it comes from. You may be wondering what to do when you detect a reversing gear noise that continues on your Bmw Serie 7? Any gearbox problem can be serious, but before making sure, it is better to do a few inspections. Our team has created this article to help you fix it. First, we will see what the sources and the different gearbox noises can be on Bmw Serie 7, and second, what are the solutions available to you.
Classical reverse Bmw Serie 7 noises and some tips to look after your gearbox
Why does the reversing of my Bmw Serie 7 make a different noise from my other speeds?
De facto, integrating all gears, bearings and pinions into a gearbox is a difficult action. The noise generated by the reversing of your Bmw Serie 7 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 strong than with spur gears used 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 exert on the gears will be enormous and you will create 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 typical if you find out a reverse noise on your Bmw Serie 7 if you shift gear under these conditions.
Diverse Bmw Serie 7 reversing noises and their causes
Finally in this section, we will move on to what you are probably most interested in this document, to learn about the source of reversing noise on Bmw Serie 7. Here are the 3 typical sounds you may be victim of.
I find out a grinding noise when starting in reverse gear
If you discover a grinding noise when you start in reverse with your Bmw Serie 7, 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 consult this paper for more information about strut mount noises on Bmw Serie 7.
An increased reverse knocking noise on Bmw Serie 7X
If you are subject to a knocking noise when you are in reverse with your Bmw Serie 7 and this noise tends to build up as you gain speed. It is possible that you are confronting a serious problem that needs to be solved very fast before destroying your entire gearbox. In fact, an intensifying rattling noise means that the gears are damaged. If they are, debris will propagate to the rest of the box and damage other gears before long. Take your car to your repair shop quickly or browse this content about gearbox noise on Bmw Serie 7 for more data.
I find out a noise when I go in reverse
Finding out 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 Bmw Serie 7 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.
