F30POST
F30POST
2012-2015 BMW 3-Series and 4-Series Forum
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > 2012-2019 BMW 3 and 4-Series Forums > General F34 3-Series GT (Gran Turismo) Forum > Hissing sound from transmission
Extreme Power House
Post Reply
 
Thread Tools Search this Thread
      08-17-2017, 02:59 AM   #1
phnikola
New Member
3
Rep
12
Posts

Drives: F34 LCI 320d
Join Date: Aug 2017
Location: Belgium

iTrader: (0)

Hissing sound from transmission

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

Last edited by phnikola; 08-18-2017 at 05:52 AM.
Appreciate 0
      08-17-2017, 05:00 AM   #2
Skald
Private
Skald's Avatar
Hungary
33
Rep
84
Posts

Drives: '16 F34 320d luxury
Join Date: Nov 2015
Location: Hungary

iTrader: (0)

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?
Appreciate 0
      08-17-2017, 08:08 AM   #3
phnikola
New Member
3
Rep
12
Posts

Drives: F34 LCI 320d
Join Date: Aug 2017
Location: Belgium

iTrader: (0)

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.
Appreciate 0
      08-17-2017, 12:06 PM   #4
Skald
Private
Skald's Avatar
Hungary
33
Rep
84
Posts

Drives: '16 F34 320d luxury
Join Date: Nov 2015
Location: Hungary

iTrader: (0)

Quote:
Originally Posted by phnikola View Post
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 . )
Appreciate 0
      08-17-2017, 04:58 PM   #5
phnikola
New Member
3
Rep
12
Posts

Drives: F34 LCI 320d
Join Date: Aug 2017
Location: Belgium

iTrader: (0)

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
Appreciate 0
      08-17-2017, 05:13 PM   #6
Daftasabrush
Fool
Daftasabrush's Avatar
England
894
Rep
2,656
Posts

Drives: F31 340i
Join Date: Jul 2014
Location: England

iTrader: (0)

Quote:
Originally Posted by phnikola View Post
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.
__________________
Appreciate 1
      08-17-2017, 06:08 PM   #7
Skald
Private
Skald's Avatar
Hungary
33
Rep
84
Posts

Drives: '16 F34 320d luxury
Join Date: Nov 2015
Location: Hungary

iTrader: (0)

Quote:
Originally Posted by phnikola View Post
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?
Appreciate 1
      08-17-2017, 06:35 PM   #8
Billfitz
Colonel
United_States
761
Rep
2,867
Posts

Drives: '15 328iX GT
Join Date: Jan 2015
Location: New Hampshire

iTrader: (0)

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.
Appreciate 0
      08-27-2017, 05:21 PM   #9
Sirus
Registered
0
Rep
2
Posts

Drives: Bmw F34 Gt 335ix
Join Date: Jul 2017
Location: Sweden

iTrader: (0)

I've never heard it in mine either.
Appreciate 0
      08-27-2017, 05:28 PM   #10
perryo91
Second Lieutenant
perryo91's Avatar
27
Rep
220
Posts

Drives: 335
Join Date: Apr 2009
Location: FL

iTrader: (0)

Quote:
Originally Posted by Skald View Post
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.
__________________
Hi
Appreciate 0
      08-28-2017, 04:55 AM   #11
phnikola
New Member
3
Rep
12
Posts

Drives: F34 LCI 320d
Join Date: Aug 2017
Location: Belgium

iTrader: (0)

Quote:
Originally Posted by perryo91 View Post
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 )
Appreciate 1
      10-05-2017, 02:26 PM   #12
jeffGermanStick
Registered
Canada
0
Rep
1
Posts

Drives: 2015 335i Gran Turismo
Join Date: Aug 2017
Location: Vancouver

iTrader: (0)

Hey, I have this as well, I think sounds more like a electronic noise to me.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -4. The time now is 01:13 AM.




f30post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST