It is never pleasant to hear a sound on your car that you don’t know where it comes from. You may be wanting to know what to do when you notice a reversing gear noise that lasts on your Bmw Serie 1 F21? Any gearbox issue can be serious, but before making sure, it is better to do a few investigations. Our team has created this article to help you eliminate it. First, we will see what the origins and the different gearbox noises can be on Bmw Serie 1 F21, and second, what are the solutions available to you.
Classical reverse Bmw Serie 1 F21 noises and some tips to protect your gearbox
Why does the reversing of my Bmw Serie 1 F21 make a different noise from my other speeds?
De facto, integrating all gears, bearings and pinions into a gearbox is a difficult process. The noise induced by the reversing of your Bmw Serie 1 F21 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 important than with spur gears used 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 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 idea. Indeed, the pressure you will exert on the gears will be monumental 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 typical if you find out a reverse noise on your Bmw Serie 1 F21 if you shift gear under these conditions.
Several Bmw Serie 1 F21 reversing noises and their triggers
Finally in this section, we will move on to what you are probably most interested in this article, to learn about the source of reversing noise on Bmw Serie 1 F21. Here are the 3 typical sounds you may be victim of.
I perceive a grinding noise when starting in reverse gear
If you hear a grinding noise when you start in reverse with your Bmw Serie 1 F21, 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 made 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 page for more info about strut mount noises on Bmw Serie 1 F21.
An increased reverse knocking noise on Bmw Serie 1 F21X
If you are subject to a knocking noise when you are in reverse with your Bmw Serie 1 F21 and this noise tends to increase as you gain speed. It is plausible that you are dealing with a serious issue that needs to be fixed as soon as possible 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 car to your auto technician quickly or read this content page about gearbox noise on Bmw Serie 1 F21 for more details.
I find out 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 1 F21 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.
