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      11-11-2012, 02:21 PM   #67
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the clutches will wear, but this is what they are intended for. any clutchdisc will wear... slowly...
as long as they scratch, they are still vital ;-)
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      11-11-2012, 11:49 PM   #68
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Had the noise at 30k miles. Went away on its own and hasn't come back. Now at 38k
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      11-12-2012, 02:54 AM   #69
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I had my clutches were replaced by the dealer at 15k miles and no more noise turning at low speeds.
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      11-12-2012, 04:13 AM   #70
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really?!
bmw doesnt offer spareparts for that unit... they dont even offer the complete vlsd unit... only a new rearend.

you definitely need a special tool to open the vlsd unit. it would really be interesting, where they got the clutches and the tools from as gkn doesnt provide this stuff either.
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      07-31-2013, 03:39 AM   #71
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Am I the only one who had the diff oil changed with the special diff oil, and the noise remains?
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      07-31-2013, 03:52 AM   #72
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      07-31-2013, 03:53 AM   #73
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It can take quite a few miles for the modified diff oil to work its way between the clutch plates in the diff....making tight figure of 8 turns in a parking lot can speed up the process.
For future searches on this issue:
My car has made a rubbing noise from the diff when cold on slow speed RH turns since new but I refused the offer from my SA of having the modifed oil...45K miles later it still does makes the same noise with no ill effect I can discern. On the plus side the diff locks up perfectly - smooth power slides in the wet and dry are super easy to perform.
AIUI the factory diff oil fill can be one of several diff oils and it does occur to me that that perhaps one of the factory fill oils is less able that others which would account for the rather random occurence of the the problem only affecting some cars.
The Castrol SAF-J diff oil has been around for a long time and is very popular with manufacturers so I'm wondering if the affected cars got some other inferior oil?
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      07-31-2013, 10:15 AM   #74
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Quote:
Originally Posted by spyderco10 View Post
Am I the only one who had the diff oil changed with the special diff oil, and the noise remains?
do the turns that is stated by the SIB when the modifier fluid is changed.

Also, I would check the receipt and look for the part number that's unqiue to the additive just to make sure they used that fluid.
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      07-31-2013, 08:06 PM   #75
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I did the turns as stated in the SIB, I checked the part # with the one on the receipt, they match up. So weird. The only thing I can think of is an independent shop did the diff oil change, and not the dealer. I may take it to the dealer and have them change it once and for all.

I also hear the scraping noise when driving in a straight line, downshifting, and engaging the clutch fast. At the point of engagement (clutch pedal released), it emits that scraping sound. This scraping sound is also present when in gear, under engine braking, usually more audible when the car's not warmed up yet. Same scraping noise can be heard when engaging clutch in reverse, in a straight line, even when car is completely warmed up.

I'm suspecting there is something more going on here than a noisy differential.
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      08-01-2013, 03:38 AM   #76
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The diff oil with extra friction modifier will only "fix" the rubbing noise heard when making relatively tight slow turns usually when cold.
Your noise sounds more clutch/MT related....can you make a recording of it?
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      12-18-2013, 09:50 PM   #77
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Just heard this noise for the first time a few days ago n have duplicated the noise a few times since. I guess im gonna have to call the dealer. Is this a recall (free service) or is it something I will have to pay for?
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      12-18-2013, 11:00 PM   #78
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Quote:
Originally Posted by SilentAttack View Post
Just heard this noise for the first time a few days ago n have duplicated the noise a few times since. I guess im gonna have to call the dealer. Is this a recall (free service) or is it something I will have to pay for?
Not a recall. FIY, this is an issue that was pretty common with the E46 as well. Usually when people switched to a new diff fluid and had noise, the issue almost always went away when going back to OEM fluid with friction modifier.
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      12-20-2013, 01:10 AM   #79
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Ill call the dealer to see what it cost to change the fluid tomorrow.

Thanks
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      12-31-2013, 05:39 PM   #80
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Mine will go in on Thursday for this issue. My sound is a low whoooo whoooo. Is that what people call grinding noise?
Knowing how clueless my dealer usually is, I need as much information to take with me as possible.....
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      12-31-2013, 05:55 PM   #81
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+1

my sound is a low, rumble/muffled type sound. definitely not grinding metal sound. let me know what you find out from your dealer
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      12-06-2014, 09:40 PM   #82
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I've searched and haven't found anything close to my noise but this thread so I'm bumping it for some insight and help. My car I just bought from a dealer a few weeks ago
2011 Jet Black Comp Package 6sp with 25k miles.

When test driving it it sounded like we had a flat tire when we pulled out from dealer. Then after checking out the tires with the salesman they looked fine. So we drove off and as soon as we turned the corner on a turn we heard this thump thump thump noise and then thought something was rolling around in trunk. Well nothing in trunk. It comes and goes but can't consistently replicate it. I have 8months of warranty so I dont want to ignore if it's an issue. Any input would be appreciated

Thanks
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      12-06-2014, 09:46 PM   #83
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Quote:
Originally Posted by M5 to M3 View Post
I've searched and haven't found anything close to my noise but this thread so I'm bumping it for some insight and help. My car I just bought from a dealer a few weeks ago
2011 Jet Black Comp Package 6sp with 25k miles.

When test driving it it sounded like we had a flat tire when we pulled out from dealer. Then after checking out the tires with the salesman they looked fine. So we drove off and as soon as we turned the corner on a turn we heard this thump thump thump noise and then thought something was rolling around in trunk. Well nothing in trunk. It comes and goes but can't consistently replicate it. I have 8months of warranty so I dont want to ignore if it's an issue. Any input would be appreciated

Thanks
Derek

the rear diff fluid issue should sound like tires rubbing against the inner wall; if your issue is thumping, its prob not rear diff fluid; i would get the suspension checked ASAP
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      12-07-2014, 10:39 AM   #84
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My car has this diff noise as well, but does it when at operating temp as well as when cold. I thought at first it was a rear tire rubbing, but after reading this thread it is definitely the diff. I'm going in for an oil change under warranty and will have them change the diff fluid while they are at it.
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      12-08-2014, 12:53 PM   #85
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Suspension? Never thought it could be that. I will take it to the dealer asap. It's frustrating not being able to consistently replicate the noise but when it does make the noise its a very distinct hollow thump thump thump noise and not a metal or grinding noise.
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      12-09-2014, 01:11 AM   #86
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This happened to me at one point. They changed out the diff fluid and it has been fine ever since.
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      12-10-2014, 10:21 AM   #87
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Mine makes crunching noises at low speed turns, specifically to the right. I hate it.
I am out of warranty but the fluid was replaced just 5k miles ago. I may try and have the dealer replace it withe the "fix" fluid. I need to check the service order when I get home to see what they put in it.
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      12-10-2014, 12:54 PM   #88
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This is a common LSD issue when it gets cold (steering rack occasionally gets groany too). There is a service bulletin to have your LSD fluid changed, or occasionally they'll do it as part of the rear axle service.

The bulletin points out it's important to make like 50 tight circles in each direction to let the new fluid thoroughly distribute.
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