[phnikola]

Hi all!

This is my first automatic BMW (F34 LCI, 320d, 140kW, automatic with paddle shifters on sports wheel)
During any gear change from D to N or R, no matter if car is standing or in driving, I head very low hissing sound for 1 sec from gearbox itself.

UPDATE: video from post #5: https://vid.me/LLdGi

Can anyone tell if this is normal - and that I should rest my OCD or gearbox should be COMPLETELY silent?

Thank you

[Skald]

When I start my vehicle in the morning and put it in any gear there is a short, very low sound but nothing similar to hissing. After driving it for a while, it's completely silent. Could you record the sound perhaps?

[phnikola]

Thank you for reply.

For me there is no difference.
Each time I shift between D - N - R (like traffic light stop) there is short sound like hissing (actually like gearbox mechanism is internally deploying command and starts moving mechanical parts as a response to moving the lever). Once I switch to manual mode (+/-) this sound is gone. Also sound is not present if I use paddle shifters.

So its only D - N - R positions change. It is very short - but I can definitely hear it each time if there is no music in the car.

I will try to record it today after work.

[Skald]

Originally Posted by phnikola

Thank you for reply.

For me there is no difference.
Each time I shift between D - N - R (like traffic light stop) there is short sound like hissing (actually like gearbox mechanism is internally deploying command and starts moving mechanical parts as a response to moving the lever). Once I switch to manual mode (+/-) this sound is gone. Also sound is not present if I use paddle shifters.

So its only D - N - R positions change. It is very short - but I can definitely hear it each time if there is no music in the car.

I will try to record it today after work.

Well I think you shouldn't stress out, the ZF mechanism isn't totally silent when you are changing modes, you should hear a small "shh" noise every time you change modes. Not as loud as in this video but something similar https://www.youtube.com/watch?v=kG-0V-85H_0 wait for it . )

[phnikola]

Here is the video of what I am talking about
Any thoughts on if this is normal or not are much appreciated


https://vid.me/LLdGi

[Daftasabrush]

Originally Posted by phnikola

Here is the video of what I am talking about
Any thoughts on if this is normal or not are much appreciated


https://vid.me/LLdGi

These are electronically shifting transmissions and that sounds like the mechatronics moving in the gearbox. I don't hear them that loudly in my car but can hear them. Probably nothing to worry about tbh.

[Skald]

Originally Posted by phnikola

Here is the video of what I am talking about
Any thoughts on if this is normal or not are much appreciated


https://vid.me/LLdGi

that's standard sound - totally fine. Could you upload a picture of your interior trim please? is that individual white?

[Billfitz]

I've never heard it in mine, but my radio is always on. If I could hear it over the radio I'd be concerned.

[Sirus]

I've never heard it in mine either.

[perryo91]

Originally Posted by Skald

that's standard sound - totally fine. Could you upload a picture of your interior trim please? is that individual white?

Looks like aluminum but the reflection of the light makes it look brighter.

[phnikola]

Originally Posted by perryo91

Looks like aluminum but the reflection of the light makes it look brighter.

Ah, forgot to respond to this timely.
No, its just basic plastic trim (aluminium-like).
I will post some more photos in the official thread (once I wash the car )

[jeffGermanStick]

Hey, I have this as well, I think sounds more like a electronic noise to me.