Clutch Slur

Bounce · 29-01-2010, 01:12 AM

Hi guys,bin having trouble with the old clutch slur issue since i got the CSL,being on 60k i thought the clutch may be on the way out.But after driving in S5 and giving it some welly,then in S1 for a couple of days,i went out for a blast tonight on the dry roads[for a change]and its gone,and pulling like a train.So thanks for the tips on how to sort it guys.WHEN and if the slur returnes ill get the warranty to have a look,now i know the clutch is not fooked.The previous owner said he used to lift on changes,which is a big no no in my book.

**glendog74** · 29-01-2010, 02:09 AM

Quote:

Originally Posted by BOUNCE

The previous owner said he used to lift on changes,which is a big no no in my book.

Indeed - only gayboys lift on changes

**danr55** · 29-01-2010, 09:29 AM

What is clutch slur? I've pretty much left it in S5 since buying the car, maybe I need to change it about a bit, sometimes the changes seems to drop the revs, and I dont think the clutch needs replacing. Well, hope not..

SpineOnABap · 29-01-2010, 08:17 PM

Quote:

Originally Posted by danr55

What is clutch slur? I've pretty much left it in S5 since buying the car, maybe I need to change it about a bit, sometimes the changes seems to drop the revs, and I dont think the clutch needs replacing. Well, hope not..

Under acceleration on a wide-open throttle do some short-shifts at around 4-6k RPM and you could well experience it. You'll feel / hear the wha-wha-wha-wha-wha-oh hang on there's the gear fully engaged.

It's the single most irritating thing about the CSL and something they (BMW) have never addressed.

It does come and go depending on driving style and I think it can also be gotten rid of by clearing the error logs down (worked on mine a few months back).

When mine does it (frequently) it makes me want to get out and smash it up with a massive laser axe through the bonnet. Infuriating!

**glendog74** · 29-01-2010, 08:33 PM

Maybe I've just been lucky but I have not yet experienced clutch slur in almost 2 years of ownership. The closest I get to it are the lengthened gear changes that you get when I try 'S1' on a rare occasion.

FYI, I never lift when giving it the beans & my car was a late build which had a replacement clutch some time before I bought it.

shane@mbtech · 29-01-2010, 09:19 PM

Quote:

Originally Posted by glendog74

Maybe I've just been lucky but I have not yet experienced clutch slur in almost 2 years of ownership. The closest I get to it are the lengthened gear changes that you get when I try 'S1' on a rare occasion.

FYI, I never lift when giving it the beans & my car was a late build which had a replacement clutch some time before I bought it.

Never experienced clutch slur myself,

Maybe we drive them properly, Rob

Bounce · 29-01-2010, 04:27 PM

Quote:

Originally Posted by glendog74

Indeed - only gayboys lift on changes

Is throttle lifting and shirt lifting the same sort of thing then.

**AlexGTT** · 29-01-2010, 05:58 PM

Quote:

Originally Posted by BOUNCE

Is throttle lifting and shirt lifting the same sort of thing then.

In a word....................................yes.:hahah a:

Magsy · 03-03-2010, 07:14 PM

I have a slow M3 not a CSL but I have developed this problem too so I thought I'd chip in.

Car has 30k, 54 plate, nothing wrong. Drove 3000 miles inc 'ring and it was whacking me really hard, perfect engagement of clutch. Went up Stelvio, tons of passes, flat out on the a'bahn; my clutch was good

I got BMW DIS on my laptop and one night back in Novemeber I hit the 'Reset Clutch Curves' option. It asked me to start the car, so I fired it up, felt it pulsing the clutch to find the bite point and it was done.

Well I wish I hadn't done that now because from then till now it slur's! I've reset it twice since, done a full gearbox teach in, basically all the options.

There is no point to the story really except that it just goes to confirm there is some issue in the software that just doesn't learn the correct way to release the clutch.

Hard driving for a few hundred miles helps but its is always bad on a cold morning and never fails to slip at 4-6k full throttle.

I know my clutch was fine and just hitting a button caused this issue, fecking mad with myself

(I have the BMW work instructions too, so I'm almost certain I did everything correctly but I might try taking it to someone...)

s.mac · 03-03-2010, 07:49 PM

Ive just had all the updates done to stop the hesitation in gear change and found anti slip kicks in as soon as I boot it even when changing to 2nd and 3rd

I haven't done enough miles or driven it like it should be to see if it sorts its self out

29-01-2010, 01:12 AM	#1
Bounce CSL Register Uber-poster! Join Date: Nov 2009 Location: Cornwall Posts: 7,057 Casino cash: $35793	Clutch Slur Hi guys,bin having trouble with the old clutch slur issue since i got the CSL,being on 60k i thought the clutch may be on the way out.But after driving in S5 and giving it some welly,then in S1 for a couple of days,i went out for a blast tonight on the dry roads[for a change]and its gone,and pulling like a train.So thanks for the tips on how to sort it guys.WHEN and if the slur returnes ill get the warranty to have a look,now i know the clutch is not fooked.The previous owner said he used to lift on changes,which is a big no no in my book.

29-01-2010, 08:33 PM	#5
glendog74 CSL Register Uber-poster! Tetris Champion! Join Date: Apr 2008 Location: Cornwall Posts: 8,861 Casino cash: $32299	Maybe I've just been lucky but I have not yet experienced clutch slur in almost 2 years of ownership. The closest I get to it are the lengthened gear changes that you get when I try 'S1' on a rare occasion. FYI, I never lift when giving it the beans & my car was a late build which had a replacement clutch some time before I bought it. __________________ Cha'mone Mother F**ker!

29-01-2010, 09:29 AM	#3
danr55 S5 - Full Throttle Join Date: May 2009 Posts: 262 Casino cash: $604	What is clutch slur? I've pretty much left it in S5 since buying the car, maybe I need to change it about a bit, sometimes the changes seems to drop the revs, and I dont think the clutch needs replacing. Well, hope not..

03-03-2010, 07:14 PM	#9
Magsy Wonky 'L' after Washing Join Date: Mar 2010 Posts: 6 Casino cash: $346	I have a slow M3 not a CSL but I have developed this problem too so I thought I'd chip in. Car has 30k, 54 plate, nothing wrong. Drove 3000 miles inc 'ring and it was whacking me really hard, perfect engagement of clutch. Went up Stelvio, tons of passes, flat out on the a'bahn; my clutch was good I got BMW DIS on my laptop and one night back in Novemeber I hit the 'Reset Clutch Curves' option. It asked me to start the car, so I fired it up, felt it pulsing the clutch to find the bite point and it was done. Well I wish I hadn't done that now because from then till now it slur's! I've reset it twice since, done a full gearbox teach in, basically all the options. There is no point to the story really except that it just goes to confirm there is some issue in the software that just doesn't learn the correct way to release the clutch. Hard driving for a few hundred miles helps but its is always bad on a cold morning and never fails to slip at 4-6k full throttle. I know my clutch was fine and just hitting a button caused this issue, fecking mad with myself (I have the BMW work instructions too, so I'm almost certain I did everything correctly but I might try taking it to someone...)

03-03-2010, 07:49 PM	#10
s.mac CSL Register Uber-poster! Join Date: Jun 2008 Posts: 4,247 Casino cash: $15600	Ive just had all the updates done to stop the hesitation in gear change and found anti slip kicks in as soon as I boot it even when changing to 2nd and 3rd I haven't done enough miles or driven it like it should be to see if it sorts its self out