M5POST
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read

Go Back   M5POST - BMW M5 Forum > F10 M5 Forum > BMW M5 (F10) General Forum

Post Reply
 
Thread Tools Search this Thread
      12-04-2012, 07:34 PM   #1
URBAN LEGEND
Rocky
URBAN LEGEND's Avatar
United_States
411
Rep
3,085
Posts

Drives: 16 M5, 18 ZL1 1LE, 18 M3
Join Date: Feb 2009
Location: Brenham TX

iTrader: (0)

Jet or turbine sound as you decel/downshift towards a stop light

What is that jet or turbine sound as you decel/downshift towards a stop light or full stop? I had the same sound on my 09 M3 DCT.

That sound was non existent on the crappy 11 550i. So we know its not the turbos.

I am thinking its the DCT tranny. Thoughts?

Love that sound BTW.
__________________
22 Audi RS E-Tron GT
21 Model S Plaid
Appreciate 0
      12-04-2012, 09:08 PM   #2
URBAN LEGEND
Rocky
URBAN LEGEND's Avatar
United_States
411
Rep
3,085
Posts

Drives: 16 M5, 18 ZL1 1LE, 18 M3
Join Date: Feb 2009
Location: Brenham TX

iTrader: (0)

So no one else has their car produce this sound? Understood. Thanks.
__________________
22 Audi RS E-Tron GT
21 Model S Plaid
Appreciate 0
      12-04-2012, 10:09 PM   #3
LAKEOM5
Second Lieutenant
LAKEOM5's Avatar
United_States
16
Rep
289
Posts

Drives: 2013 M5 Black Sapphire
Join Date: Apr 2012
Location: Lake Oswego, Oregon

iTrader: (0)

It's your sphincter unclinching from driving such a bad ass car.
Appreciate 0
      12-04-2012, 10:18 PM   #4
Rohardi
Lieutenant
19
Rep
505
Posts

Drives: 2014 Q50S Hybrid
Join Date: Apr 2012
Location: Rhode Island

iTrader: (0)

I don't have my M5 yet, But maybe it's the flux capacitor???? Did you get to 88MPH???
Appreciate 0
      12-05-2012, 01:29 AM   #5
HatersGonHateSMH
Banned
2
Rep
36
Posts

Drives: Frozen white m5/Fire orange m3
Join Date: Oct 2012
Location: Los alamitos, California

iTrader: (0)

It's the downshift of the DCT I think. It's more distinct on the m performance exhaust on my lre m3 (;
Appreciate 0
      12-05-2012, 01:54 AM   #6
wisesoul
Savoir Faire
wisesoul's Avatar
Philippines
74
Rep
1,772
Posts

Drives: 2013 BMW M5
Join Date: Aug 2010
Location: Los Angeles, Ca

iTrader: (0)

Quote:
Originally Posted by LAKEOM5 View Post
It's your sphincter unclinching from driving such a bad ass car.
__________________
Current: Alpine White F10 M5|H&R springs|12mm/10mm spacers|Eisenmann Race
Sold:Imola Yellow RS4-KW V3|MTM 10mm spacers|Hotchkis rear sway bar|APR Stage 1|Milltek Catless|RNS-E|Euro RS4 Flat bottom Steering Wheel
Sold:E46 323i
Appreciate 0
      12-05-2012, 08:48 AM   #7
URBAN LEGEND
Rocky
URBAN LEGEND's Avatar
United_States
411
Rep
3,085
Posts

Drives: 16 M5, 18 ZL1 1LE, 18 M3
Join Date: Feb 2009
Location: Brenham TX

iTrader: (0)

Quote:
Originally Posted by LAKEOM5 View Post
It's your sphincter unclinching from driving such a bad ass car.
Thanks for dumb reply.
__________________
22 Audi RS E-Tron GT
21 Model S Plaid
Appreciate 0
      12-05-2012, 08:49 AM   #8
URBAN LEGEND
Rocky
URBAN LEGEND's Avatar
United_States
411
Rep
3,085
Posts

Drives: 16 M5, 18 ZL1 1LE, 18 M3
Join Date: Feb 2009
Location: Brenham TX

iTrader: (0)

Quote:
Originally Posted by Rohardi View Post
I don't have my M5 yet, But maybe it's the flux capacitor???? Did you get to 88MPH???
So why are you commenting on a car you dont have? Contribute or go away.
__________________
22 Audi RS E-Tron GT
21 Model S Plaid
Appreciate 0
      12-05-2012, 09:35 AM   #9
Rohardi
Lieutenant
19
Rep
505
Posts

Drives: 2014 Q50S Hybrid
Join Date: Apr 2012
Location: Rhode Island

iTrader: (0)

Quote:
Originally Posted by URBAN LEGEND View Post
So why are you commenting on a car you dont have? Contribute or go away.
I'm sorry, It was a joke. I didn't realize you had to be in the exclusive club ownership to comment. I'll come back in the summer when I get My car. Troll much????
Appreciate 0
      12-05-2012, 05:15 PM   #10
thebishman
Major
United_States
495
Rep
1,104
Posts

Drives: ‘24 iX M60
Join Date: Sep 2012
Location: Overland Park, KS

iTrader: (0)

Quote:
Originally Posted by URBAN LEGEND View Post
What is that jet or turbine sound as you decel/downshift towards a stop light or full stop? I had the same sound on my 09 M3 DCT.

That sound was non existent on the crappy 11 550i. So we know its not the turbos.

I am thinking its the DCT tranny. Thoughts?

Love that sound BTW.
If its more noticeable when slowing quickly its probably the front brakes 'whirring' as you slow down to a stop. Fairly typical with a two piece rotor design.
Bish
Appreciate 0
      12-05-2012, 11:04 PM   #11
LAKEOM5
Second Lieutenant
LAKEOM5's Avatar
United_States
16
Rep
289
Posts

Drives: 2013 M5 Black Sapphire
Join Date: Apr 2012
Location: Lake Oswego, Oregon

iTrader: (0)

Quote:
Originally Posted by URBAN LEGEND View Post
Thanks for dumb reply.


Ask a dumb question.....




Lighten up Francis.
Appreciate 0
      12-23-2012, 06:46 PM   #12
mainly
Lieutenant
Canada
41
Rep
563
Posts

Drives: 991 GT3, '12 CLS63 Kleemann K3
Join Date: Mar 2012
Location: Edmonton alberta, canada.

iTrader: (0)

i think youre just talking about the sound of the gear downshifts/ rev's decreasing... ?
Appreciate 0
      12-23-2012, 09:29 PM   #13
smashhell
Lieutenant
United_States
23
Rep
490
Posts

Drives: 2011 535i
Join Date: Dec 2011
Location: Los Angeles, CA

iTrader: (0)

Any sound clip so we know what it is?
__________________
2011 535i Alpine White, Oyster on black interior, Premium 1 & 2 Package, Magnaflow Full Cat-Back Exhaust, JB4 Stage 2
Appreciate 0
      12-24-2012, 06:34 AM   #14
bradone1
BMW Extraordinaire
United_States
50
Rep
412
Posts

Drives: 2019 X7 M Sport, 2015 M4 Vert
Join Date: Aug 2012
Location: Miami

iTrader: (0)

Quote:
Originally Posted by LAKEOM5
Quote:
Originally Posted by URBAN LEGEND View Post
Thanks for dumb reply.


Ask a dumb question.....




Lighten up Francis.
Agree, maybe this post didn't really occur in the first place to where it doesn't require an answer?

Sheesh
Appreciate 0
      12-25-2012, 12:52 AM   #15
dr.skp.ortho
Private First Class
dr.skp.ortho's Avatar
Australia
15
Rep
107
Posts

Drives: 991 911 Carrera S, F06 M6 GC
Join Date: Jul 2007
Location: NSW, Australia

iTrader: (0)

It's normal drivetrain noise
__________________
Porsche 991 911 Carrera S
BMW F06 M6 Gran Coupe
BMW F15 X5 5.0 Xdrive M Sport.
Mercedes C250
Appreciate 0
      12-25-2012, 07:56 AM   #16
Warehouser
Private First Class
Warehouser's Avatar
29
Rep
147
Posts

Drives: 22 X5M TBlue2
Join Date: Nov 2012
Location: SE Texas

iTrader: (0)

Quote:
Originally Posted by dr.skp.ortho View Post
It's normal drivetrain noise
Mine's the same, it's the DCT and sounds like a truck sometimes. Hoping that it goes away with the 1200mi service. Do they change out the tranny fluid @ 1200?
Appreciate 0
      12-25-2012, 11:08 AM   #17
dropstart67
New Member
2
Rep
17
Posts

Drives: 2013 M5
Join Date: Sep 2012
Location: So Cal

iTrader: (0)

I believe it is normal drivetrain noise too. I hear it on my car and it reminds me of the gear "whine" you would hear on a sequential race transmission (like a Hewland or Xtrac). Gearboxes with straight-gears typically have this sound although its usually louder and more pronouced. I am not familiar with the gear design in the F10 M5 but I'm assuming its something similar. I know what you're talking about - most pronouced on a decel to a red-light at certain RPMs - and it's definitely not the active sound.
Appreciate 0
      12-25-2012, 03:09 PM   #18
Boss330
Major General
Boss330's Avatar
No_Country
1712
Rep
5,108
Posts

Drives: BMW
Join Date: Mar 2012
Location: Earth

iTrader: (0)

Sounds like drivetrain noise. It's probably from the tooths on the gears as they are transferring force/torque on the "wrong" side of the gear teeth. They are designed to transfer torque under acceleration and might make more noise when decelerating as the teeth are engaging on the opposite side of the tooth. Race transmissions or transmissions that are for heavy duty use have more straight cut gears. Straight cut gears make more noise but don't generate the longitudinal force that wants to push the driving and driven gears apart from each other (one gear wants to go forward and the other rearwards, creating a lot of frictional losses and stress on bearings).

An automatic transmission uses planetary gears and don't operate in the same way as a manual transmission.

My guess is gear noise.
Appreciate 0
      12-25-2012, 03:45 PM   #19
mainly
Lieutenant
Canada
41
Rep
563
Posts

Drives: 991 GT3, '12 CLS63 Kleemann K3
Join Date: Mar 2012
Location: Edmonton alberta, canada.

iTrader: (0)

Quote:
Originally Posted by URBAN LEGEND View Post
What is that jet or turbine sound as you decel/downshift
or maybe its those 2 turbines in the engine?

...
Appreciate 0
      12-26-2012, 04:40 AM   #20
Boss330
Major General
Boss330's Avatar
No_Country
1712
Rep
5,108
Posts

Drives: BMW
Join Date: Mar 2012
Location: Earth

iTrader: (0)

Quote:
Originally Posted by mainly View Post
or maybe its those 2 turbines in the engine?

...
Probably not as he said that his M3 DCT had the same noise and that his 550i did not (which also has two turbines).

The only common relevant item between the M3 and M5 is a DCT transmission?
Appreciate 0
      12-27-2012, 03:44 PM   #21
Protious
Private First Class
30
Rep
157
Posts

Drives: 2013 BMW M5
Join Date: Nov 2012
Location: Texas

iTrader: (0)

I've test driven two M5's, they all have the same sound. The one I ended up with has this sound as well. I actually like it, makes me feel like I'm in a jet

My only complaint is that during very cold weather (below freezing), it seems to 'screech' but goes away quickly once it's warmed up.
Appreciate 0
      12-27-2012, 04:02 PM   #22
johntomferg
Captain
United_States
119
Rep
852
Posts

Drives: Formerly drove a 13 F10 M5
Join Date: May 2012
Location: Columbia, TN

iTrader: (1)

Quote:
Originally Posted by dliang View Post
I've test driven two M5's, they all have the same sound. The one I ended up with has this sound as well. I actually like it, makes me feel like I'm in a jet

My only complaint is that during very cold weather (below freezing), it seems to 'screech' but goes away quickly once it's warmed up.
Confirmed. It is a little bit "chatty" when the outside temp is below 35 (until it warms up). Parking it in the (unheated) garage doesn't seem to improve it either.

If you haven't driven a GTR, then you don't know how good you got it. Performance and (quiet) luxury in the M5 is so much better. At the end of the day, it is still a hi perf machine with moving parts.
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 -5. The time now is 12:57 PM.




m5post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
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