03-29-2013, 11:52 AM | #1 |
First Lieutenant
56
Rep 348
Posts |
Help with strange sound from transmission
I am starting to get a noticebly louder sound from what I think is the transmission. When the car is stopped and in neutral, I can hear a faint rattle or whirring sound. Frankly, it sounds like a helicopter. When I depress the clutch the sound stops. Release the clutch and the helicopter is in my trunk again. It's faint, so I can't tell if it's still present when in gear and driving. Any ideas?
|
03-29-2013, 12:05 PM | #2 |
Colonel
2617
Rep 2,819
Posts
Drives: e82 1M, f87 M2cs
Join Date: Nov 2011
Location: Tri-Cities, Washington
|
How loud is it?
I am thinking dual mass flywheel chatter, but that shouldn't be very loud. |
Appreciate
0
|
03-29-2013, 12:17 PM | #3 |
First Lieutenant
56
Rep 348
Posts |
noise if faint, but I never noticed it before so I'm sure it's a new issue. I'm pretty sensitive to the noises my car makes. I can only hear with radio off. Still faint.
|
Appreciate
0
|
03-29-2013, 12:24 PM | #4 | |
European Editor
10589
Rep 22,992
Posts |
Quote:
That sound is normal for BMW's with a manual transmision. Its the dual mass flywheel flexing and dampening the vibrations. I would say "the sound" is more like that of a bunch of marbles in a metal coffee can. As long as the noise goes away when you step on the clutch - this noise is normal. If you turn off the engine you will also hear the flywheel make some noises as the rpms slow to nil. IF you depress the clutch while switching off the engine, you won't hear that noise. I also turn off the engine with the clutch pedal depressed.
__________________
|
|
Appreciate
0
|
03-29-2013, 12:39 PM | #5 |
First Lieutenant
56
Rep 348
Posts |
By marbles in a coffee can, do you mean swirling the marbles around in a circular pattern, rather than shaking the can? I think the sound I'm hearing could very well match the sound of marbles being swirled in a can. Stirred not shaken! Bond would be mortified.
|
Appreciate
0
|
03-29-2013, 12:53 PM | #6 | |
European Editor
10589
Rep 22,992
Posts |
Quote:
Sometimes changing the trans oil might change the noise a bit. Sometimes not. Its really not harming anything inside the trans though. Still... you might have your dealer listen to your trans noise - see what they think.
__________________
|
|
Appreciate
0
|
05-01-2013, 10:46 AM | #9 |
Private
34
Rep 72
Posts |
My car produces exactly the same noise...
__________________
2019 BMW F90 M5 | 2014 Porsche 991 Carrera 2S | 2013 BMW F01 740dX | 2011 BMW E82 1M Coupe | 2008 BMW E70 X5 3.0d | 2003 BMW E46 M3 Coupe | 2000 Porsche 996 Carrera 4 | 2000 BMW E39 535i | 1998 BMW E39 528i
|
Appreciate
0
|
05-02-2013, 01:03 AM | #10 |
Major General
2816
Rep 7,637
Posts |
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|