It is never pleasurable to find out a sound on your car that you don’t know where it comes from. You may be thinking what to do when you identify a reversing gear noise that lasts on your Bmw Z4? Any gearbox problem can be serious, but before making sure, it is better to do a few investigations. Our team has created this document to help you fix it. First, we will see what the sources and the different gearbox noises can be on Bmw Z4, and second, what are the solutions available to you.
Classical reverse Bmw Z4 noises and some tips to look after your gearbox
Why does the reversing of my Bmw Z4 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 caused by the reversing of your Bmw Z4 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:
Indeed, 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. Indeed, the pressure you will apply on the gears will be significant 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 usual if you notice a reverse noise on your Bmw Z4 if you shift gear under these conditions.
Diverse Bmw Z4 reversing noises and their origins
Finally in this section, we will move on to what you are probably most excited about in this content, to learn about the cause of reversing noise on Bmw Z4. Here are the 3 typical sounds you may be victim of.
I acknowledge a grinding noise when starting in reverse gear
If you find out a grinding noise when you start in reverse with your Bmw Z4, 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 case, do not hesitate to read this article for more details about strut mount noises on Bmw Z4.
An increased reverse knocking noise on Bmw Z4X
If you are subject to a knocking noise when you are in reverse with your Bmw Z4 and this noise tends to amplify as you gain speed. It is plausible that you are dealing with a serious problem that needs to be resolved very fast before ruining your entire gearbox. Indeed, 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 quickly. Take your car to your mechanic quickly or check out this content about gearbox noise on Bmw Z4 for more details.
I perceive a noise when I go in reverse
Hearing 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 Z4 reverse gear makes more noise than before, it is plausible that filings have been made and are moving around in it. It is therefore time to empty the box.
