question about LSD

killjohnnyforan · 10-11-2007, 03:19 PM

lately i am not getting as much "acoustic feedback" as i did under acceleration when i first baught the car. is this a sound that should normaly fad or is it an indication of failure

Spaceman Spiff · 10-11-2007, 04:12 PM

Where's the LSD?

killjohnnyforan · 10-11-2007, 04:51 PM

do you know what an LSD is?

Artz 330 · 10-11-2007, 05:59 PM

what did you hear when you first bought the car? Need more details.

killjohnnyforan · 10-11-2007, 07:58 PM

it was a definitive click upon heavy acceleration, or an agressive downshift

Artz 330 · 10-11-2007, 08:01 PM

a click? from the rear? Was it more of thud? If its a click, i dont think thats normal cause my car never did that.

Dammmittt · 10-11-2007, 08:18 PM

I never noticed any noises from the diff under acceleration. Shifting into first you can usually hear a click or thud...but that's just the gearbox. Maybe you're hearing chirps from the tires back there?

Edit...I do remember hearing clicks fromt he DSC trying to keep my wheels from spinning.

killjohnnyforan · 10-11-2007, 08:32 PM

i dunno, it was a definite click, a sharper sound than a thud, and it did it form day one, so i fugured it was the "acoustical feedback" mentioned in the manual, but now its gone, could have something to do w. the gearbox, which BMW NA is replacing on thursday, but where there once was a noise, now there is none!

Dammmittt · 10-11-2007, 08:43 PM

Sounds kinda like the second gear issues I had at first, but have slowly gone away. Never does it to me anymore.

Artz 330 · 10-11-2007, 10:52 PM

Quote:

Originally Posted by killjohnnyforan

i dunno, it was a definite click, a sharper sound than a thud, and it did it form day one, so i fugured it was the "acoustical feedback" mentioned in the manual, but now its gone, could have something to do w. the gearbox, which BMW NA is replacing on thursday, but where there once was a noise, now there is none!

yea, they are replacing mine too..

giem · 10-12-2007, 02:07 AM

i heard a click today too

killjohnnyforan · 10-12-2007, 03:10 PM

more of a click/pop if that helps any, hard to get words to make sounds

killjohnnyforan · 10-27-2007, 12:53 AM

when the dealer swapped my tranny, he said he has suspicions about the diff being bad as weel, but i didnt even mention my own suspicions, he came right out w. it, he said he will investigate when my lower control arm goes in in coming weeks. start rolling in 1st, then really stomp it. if you dont hear a click and a pop, have your dealer check it out, its mentioned as "acoustic feedback" in that little ///M pamphlet they give you! i cant thin of what else they might mean

Dammmittt · 10-27-2007, 09:12 AM

If you don't hear something, there might be something wrong??? That's a first.

10-11-2007, 03:19 PM	#1
killjohnnyforan First Lieutenant 30 Rep 339 Posts Drives: ///M Coupe Join Date: Jun 2007 Location: NY iTrader: (1)	question about LSD lately i am not getting as much "acoustic feedback" as i did under acceleration when i first baught the car. is this a sound that should normaly fad or is it an indication of failure
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10-11-2007, 04:12 PM	#2
Spaceman Spiff Captain 93 Rep 847 Posts Drives: R8, 996 C2, Z4MR (sold) Join Date: Aug 2007 Location: SF Bay iTrader: (1)	Where's the LSD?
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10-11-2007, 04:51 PM	#3
killjohnnyforan First Lieutenant 30 Rep 339 Posts Drives: ///M Coupe Join Date: Jun 2007 Location: NY iTrader: (1)	do you know what an LSD is?
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10-11-2007, 05:59 PM	#4
Artz 330 Colonel 200 Rep 2,486 Posts Drives: Z4M, 335i, 135i Join Date: Dec 2005 Location: Lawrenceville, NJ iTrader: (4) Garage List 2006 330i [0.00]	what did you hear when you first bought the car? Need more details. __________________
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10-11-2007, 07:58 PM	#5
killjohnnyforan First Lieutenant 30 Rep 339 Posts Drives: ///M Coupe Join Date: Jun 2007 Location: NY iTrader: (1)	it was a definitive click upon heavy acceleration, or an agressive downshift
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10-11-2007, 08:01 PM	#6
Artz 330 Colonel 200 Rep 2,486 Posts Drives: Z4M, 335i, 135i Join Date: Dec 2005 Location: Lawrenceville, NJ iTrader: (4) Garage List 2006 330i [0.00]	a click? from the rear? Was it more of thud? If its a click, i dont think thats normal cause my car never did that. __________________
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10-11-2007, 08:18 PM	#7
Dammmittt My favorite sign. 169 Rep 4,338 Posts Drives: 2007 M Coupe Join Date: Dec 2006 Location: Der Autobahnen iTrader: (0)	I never noticed any noises from the diff under acceleration. Shifting into first you can usually hear a click or thud...but that's just the gearbox. Maybe you're hearing chirps from the tires back there? Edit...I do remember hearing clicks fromt he DSC trying to keep my wheels from spinning. __________________ 07 ///M Coupe (Premium Package) Black Saphire Ext. Imola Red Int. Best Website EVER!
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10-11-2007, 08:32 PM	#8
killjohnnyforan First Lieutenant 30 Rep 339 Posts Drives: ///M Coupe Join Date: Jun 2007 Location: NY iTrader: (1)	i dunno, it was a definite click, a sharper sound than a thud, and it did it form day one, so i fugured it was the "acoustical feedback" mentioned in the manual, but now its gone, could have something to do w. the gearbox, which BMW NA is replacing on thursday, but where there once was a noise, now there is none!
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10-11-2007, 08:43 PM	#9
Dammmittt My favorite sign. 169 Rep 4,338 Posts Drives: 2007 M Coupe Join Date: Dec 2006 Location: Der Autobahnen iTrader: (0)	Sounds kinda like the second gear issues I had at first, but have slowly gone away. Never does it to me anymore. __________________ 07 ///M Coupe (Premium Package) Black Saphire Ext. Imola Red Int. Best Website EVER!
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10-12-2007, 02:07 AM	#11
giem Private First Class 8 Rep 184 Posts Drives: BMW Join Date: Jul 2007 Location: NA iTrader: (1)	i heard a click today too
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10-12-2007, 03:10 PM	#12
killjohnnyforan First Lieutenant 30 Rep 339 Posts Drives: ///M Coupe Join Date: Jun 2007 Location: NY iTrader: (1)	more of a click/pop if that helps any, hard to get words to make sounds
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10-27-2007, 12:53 AM	#13
killjohnnyforan First Lieutenant 30 Rep 339 Posts Drives: ///M Coupe Join Date: Jun 2007 Location: NY iTrader: (1)	when the dealer swapped my tranny, he said he has suspicions about the diff being bad as weel, but i didnt even mention my own suspicions, he came right out w. it, he said he will investigate when my lower control arm goes in in coming weeks. start rolling in 1st, then really stomp it. if you dont hear a click and a pop, have your dealer check it out, its mentioned as "acoustic feedback" in that little ///M pamphlet they give you! i cant thin of what else they might mean
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10-27-2007, 09:12 AM	#14
Dammmittt My favorite sign. 169 Rep 4,338 Posts Drives: 2007 M Coupe Join Date: Dec 2006 Location: Der Autobahnen iTrader: (0)	If you don't hear something, there might be something wrong??? That's a first. __________________ 07 ///M Coupe (Premium Package) Black Saphire Ext. Imola Red Int. Best Website EVER!
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