It is never pleasurable to find out a sound on your automobile that you don’t know where it comes from. You may be wanting to know what to do when you find a reversing gear noise that lasts on your BMW 7 Series? Any gearbox problem can be serious, but before making sure, it is better to do a few checks. Our team has written this article to help you fix it. First, we will see what the origins and the different gearbox noises can be on BMW 7 Series, and second, what are the solutions available to you.
Classical reverse BMW 7 Series noises and some tips to look after your gearbox
Why does the reversing of my BMW 7 Series make a different noise from my other speeds?
De facto, integrating all gears, bearings and pinions into a gearbox is a difficult action. The sound generated by the reversing of your BMW 7 Series 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 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 idea. Indeed, the pressure you will put in on the gears will be monumental and you will develop 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 common if you hear a reverse noise on your BMW 7 Series if you shift gear under these conditions.
Several BMW 7 Series reversing noises and their causes
Finally in this section, we will move on to what you are probably most enthusiastic about in this document, to learn about the origin of reversing noise on BMW 7 Series. Here are the 3 typical noises you may be victim of.
I perceive a grinding noise when starting in reverse gear
If you find out a grinding noise when you start in reverse with your BMW 7 Series, it may be the engine mounts that are tired. Certainly, when the engine is in reverse gear, due to the pinions we saw above the vibrations generated 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 case, do not hesitate to read this article for more details about strut mount noises on BMW 7 Series.
An increased reverse knocking noise on BMW 7 SeriesX
If you are subject to a knocking noise when you are in reverse with your BMW 7 Series and this noise tends to increase as you gain speed. It is conceivable that you are experiencing a serious problem that needs to be solved very fast before wrecking your entire gearbox. Indeed, 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 automobile to your repair shop quickly or browse this content page about gearbox noise on BMW 7 Series for more details.
I perceive a noise when I go in reverse
Experiencing a noise when you shift into reverse is normal and connected to the gears and sprockets used in the gearbox. If, on the other hand, you have the feeling that your BMW 7 Series reverse gear makes more noise than before, it is conceivable that filings have been produced and are moving around in it. It is therefore time to empty the box.
