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      04-23-2009, 10:29 AM   #23
gr8000
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Quote:
Originally Posted by iBeJayKaying View Post
If you drive it slowly in a tight circle with your steering wheel fully locked in a parking lot (or parking structure, the enclosed area will help you hear it) it should make a groaning sound, like the sound that sinking oil tankers make in movies. Try that if you WANT the noise.
You mean try sinking an oil tanker to hear how the noise sounds?
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      04-23-2009, 10:38 AM   #24
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Originally Posted by iBeJayKaying View Post
It's not aftermarket. It's warranty-covered service done at the dealership, using a BMW-created-and-approved additive.
Is there a different service bulletin that references this?... seperate from the SIB that recommends a refill with Castrol SAF XJ (which already contains friction modifiers as produced by Castrol).
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      04-23-2009, 10:41 AM   #25
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Originally Posted by VanM3Lover View Post
Would you like to drive as described in the picture for 30 minutes?

My diff makes rubbing noise and chattering noise on very tight turns, maybe it's just not broken in.
Yeah! Add a few more turns and it looks like a race track! As it is it looks like those figure 8s of death demolition derby tracks!
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      04-23-2009, 10:08 PM   #26
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I'm sitting here in the Left 4 Dead menu screen and from time to time I hear a sound that sounds just like the groaning, low speed noise
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      04-23-2009, 11:19 PM   #27
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Quote:
Originally Posted by SenorFunkyPants View Post
Is there a different service bulletin that references this?... seperate from the SIB that recommends a refill with Castrol SAF XJ (which already contains friction modifiers as produced by Castrol).
Hold on, I'm looking for whatever I had before right now...an SA sent me a link which I forwarded to a friend, and I'm trying to find it....

Dunno, you might be right on the dot with that oil thing, I don't know. All I have are #'s.
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      04-23-2009, 11:22 PM   #28
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I don't know if this is the different service bulletin stuff you're looking for but this is what I have as of right now.

Jesu Christo that was hard to find.

http://www.bmwtis.com/tsb/bulletins/...p/b330102g.htm


Key Points:

SITUATION
A grinding noise may be heard coming from the differential during slow cornering.

This noise is best heard during tight cornering situations; for example, while parallel parking, driving in a tight circle, etc.

WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.

Defect Code
33 10 92 39 00


Replace differential oil with special oil




Seriously though, ask any Tech. It's not a damaging defect, it's just noise.
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      04-24-2009, 05:36 AM   #29
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Thats the one...part number 83 22 2 282 583 (or other part numbers with different sized containers) is Castrol SAF XJ and the spec sheet I have for it from 1994 states it contains Friction modifiers.
What I was concerned about is that you can buy small bottles of diff additives to add to noisey diffs and I definitely wouldn't let anyone add that to my diff as it could critically reduce the effectiveness of the diff clutch plates allowing them to slip too easily.
The groaning noise on tight turns is a sign that the diff clutch is doing its job and I wouldn't worry about it unless its very noisey.
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      04-24-2009, 09:00 AM   #30
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Quote:
Originally Posted by SenorFunkyPants View Post
Thats the one...part number 83 22 2 282 583 (or other part numbers with different sized containers) is Castrol SAF XJ and the spec sheet I have for it from 1994 states it contains Friction modifiers.
What I was concerned about is that you can buy small bottles of diff additives to add to noisey diffs and I definitely wouldn't let anyone add that to my diff as it could critically reduce the effectiveness of the diff clutch plates allowing them to slip too easily.
The groaning noise on tight turns is a sign that the diff clutch is doing its job and I wouldn't worry about it unless its very noisey.
See? Even he agrees with me! Case closed everyone, sleep well tonight.
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      04-24-2009, 09:23 AM   #31
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The case was closed 28 posts ago.
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      04-24-2009, 11:05 AM   #32
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Quote:
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The case was closed 28 posts ago.
People were still asking, even after your fantastic answer.
Repetition, break down, regurgitation; needed to make it stick.
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      04-24-2009, 11:10 AM   #33
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True, and there are older threads on this all over this Forum.

It is something that gets repeated on many other car forums where a car with LSD makes the same noises. It was also an epidemic on the C6 section of Corvette Forum.
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      07-30-2010, 02:17 PM   #34
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I hear this on "slower" turns in either direction, but let me tell you, when I took my M3 to The Dragon's Tail / US 129 in TN/NC a couple of weeks ago, we were taking some of those curves hard and fast and the ticking was very loud in either direction of the turn. We did lots of driving that day and before reaching the Dragon's Tail, the ticking was apparent but not near as loud as it was once the car was fully heated up and running hard through the turns.
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      08-29-2010, 04:51 PM   #35
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Glad I ran across this thread. I started hearing the ticking noise during hard cornering the other day when I decided to roll down the windows during spirited driving.
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      08-29-2010, 07:42 PM   #36
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Quote:
Originally Posted by gr8000 View Post
As a matter of curiosity, are there any drawbacks when using the diff additive?
Read below.

Quote:
Originally Posted by SenorFunkyPants View Post
I definitely wouldn't let anyone add that to my diff as it could critically reduce the effectiveness of the diff clutch plates allowing them to slip too easily.
I think this is true. It's a case if you don't want any noise, you're going to have a semi-LSD .

Furthermore, without a torque-vectoring feature, an aggressive LSD is going to be most effective when launching from a dead stop, correct? Hard cornering with an aggressive (non-torque-vectoring) LSD is going to make the car more prone to oversteer, and harder to control IMO. To most folks, it's not going to matter if our LSD is made less aggressive with extra friction modifiers, but it's probaby better not to put it unless noise is driving you nuts .
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      09-20-2010, 09:50 AM   #37
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My differential makes a rubbing noise when i make a sharp right turn. My workshop finally had the differential replaced under warranty.
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