steptronic - 2nd gear at a stop - BMW 3-Series (E90 E92) Forum

jcoo085 · 12-08-2005, 05:58 PM

I've been noticing something over the last couple of weeks and was wondering if anyone has heard something similar. When I'm at a complete stop and the car is in 2nd (using M mode, either voluntarily or the car automatically selecting 2nd as part of its downshift pattern) I hear this low 'rumble' or 'hum' (don't know how else to describe it) coming from the rear. It's a very audible distinction between 1st and 2nd.

Anyone else with a 320d (or other diesel/petrol model) hearing the same thing? Any thoughts?

tctic · 12-08-2005, 06:37 PM

Rattling caused by resonance of certain frequencies of sound when in different gears? Never experienced myself.

jcoo085 · 12-08-2005, 06:40 PM

I thought of that. It just sounds weird so I was wondering if anyone had the same thing and if it was diesel specific or across the board.

12-08-2005, 05:58 PM	#1
jcoo085 Lieutenant Drives: E90 320d Join Date: Sep 2005 Location: Stuttgart, Germany Posts: 463 iTrader: (0) Garage List 2005 320d [0.00]	steptronic - 2nd gear at a stop I've been noticing something over the last couple of weeks and was wondering if anyone has heard something similar. When I'm at a complete stop and the car is in 2nd (using M mode, either voluntarily or the car automatically selecting 2nd as part of its downshift pattern) I hear this low 'rumble' or 'hum' (don't know how else to describe it) coming from the rear. It's a very audible distinction between 1st and 2nd. Anyone else with a 320d (or other diesel/petrol model) hearing the same thing? Any thoughts? __________________ E90 320d - Black Ext/Fluid Grey Int \| Steptronic \| Business Navigation \| PDC \| Sunroof \| Alarm Exterior Pictures \| Interior Pictures \| Video
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12-08-2005, 06:40 PM	#3
jcoo085 Lieutenant Drives: E90 320d Join Date: Sep 2005 Location: Stuttgart, Germany Posts: 463 iTrader: (0) Garage List 2005 320d [0.00]	I thought of that. It just sounds weird so I was wondering if anyone had the same thing and if it was diesel specific or across the board. __________________ E90 320d - Black Ext/Fluid Grey Int \| Steptronic \| Business Navigation \| PDC \| Sunroof \| Alarm Exterior Pictures \| Interior Pictures \| Video

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12-08-2005, 06:37 PM	#2
tctic Major Drives: BMW E90 Join Date: Oct 2005 Location: Canada Posts: 1,238 iTrader: (0)	Rattling caused by resonance of certain frequencies of sound when in different gears? Never experienced myself.