clutch slip
 

Hi,

New to the register and wondered if anyone can offer some advice on the following;

I have had my car around six months now but recently when changing up the gearbox it feels as though the clutch is slipping. Not sure if it just my imagination but it seems as though it is getting worse especially under any hard-ish acceleration.

Presume this means I need a new clutch!!! but thought I would ask if there is any other possible causes before taking it into a garage.

Whilst on the subject of garages...I live near ML but are they still the place to take an M car to for things like clutches?????

Cheers,

Tim

my clutch was changed after 45k miles, same symptoms.

My gut feel is if you get the clutch retaught early on it will put off the slip but no evidence yet to that effect.

Some guys just drive it hard on S6 and it goes away, but all in all if you leave it slipping too long it will ruin the clutch it seems

I've got the same symptoms, very jerky setting off, clutch slurring on changes even with traction control off and in S6. Driving me mad.

I’ve read it could be the SMG software not compensating for clutch wear and hence searching for the biting point, going to give BMW a call tomorrow to book it in. They may be able to re-calibrate the biting point ???

Thank god for warranty. (I hope)

info
 

Let us know how you get on Matt, im sure well all be interested in the result of investigation?

Had the same problem, car went to Sytner Wycombe last week and they reset clutch bite point, sorted. Hope same works for others.

Thanks for all the replies.....guess I will be booking it in to Munich Legends to see if they can reset the biting point.....fingers crossed!

PM'd

Stick it in S6 and use hard acceleration. Don't lift on the change, bang it through and see if it is better after that.

Lifting on the change will make it seem like it is slipping, however it may need the most drastic action mentioned above...

Thanks for that..........how long do you think it will need to be driven like that before it drives better?
Perhaps I am driving it a little too sympathetically it's just that it seems to change a lot smoother if I lift when selecting another gear!?

A few months ago mine went in for an oil service. Went in slurring like they do, came out sharp as nails with not a hint of slur. I asked them if they'd done a software upgrade or perhaps a re-teach and they said "no... all we do is clear the error logs". Within a few weeks it was back to it's usual self. I may pop in and get them to do 'whatever they did' again just to see if it actually does make a difference - that would be a revelation!

You mean get them to road test it and screw the balls out of it in s6 with traction off again.;)

Thats probably why it felt different.:whistle:

Update...........I've had the clutch biting point re-calibrated after finally convincing BMW it could be done.............no better still slurring, bugger.

I'm going to take the car for a proper drive in S5 and see if it helps, the weather and traffic around here aren't helping though. Other than that its get BMW to crack open the box and check the clutch, hoping its something under warranty, if not I'll have to pay for a new one.

Oh yes, BMW tried to charge me 4 hours labour for resetting the clutch as they said it wasn't covered under warranty, £110 per hour ! They eventually charged it all to training and I didn't have to pay.

That's ridiculous ... the clutch curve reinitialisation doesn't take 4 hours to do .. more like half an hour.

To reteach the whole gear selection process and clutch curve however can take quite a while - I can't remember how long now, if memory serves mine took about 4 hours to do.

Take a look here on the members thred :thumbs:

http://www.cslregister.com/forum/sho...6682#post36682

Haha!

That's the thing, it wasn't driven by them at all ... so whatever was done in the workshop sorted it. Must find out as it's been bugging me (and may help others of course).

Erasing the fault codes etc etc can reset certain systems. Probably what happened in your case.

Update….finally decided I'd had enough of the dreaded slur so booked it into Stockport BMW, they had previously recalibrated the clutch biting point but that didn't cure it, told them I thought it must be the clutch (45k miles on same clutch as far as I'm aware), the tech guy took it out and thought it was the diff, the clutch is fine, they phoned me up and said it was a warranty item so replaced it, got it back 3 days ago....I was a little dubious to say the least......day 1-took it out and it felt the same (very disappointed)....day 2-decided to give the
SMG software a chance to learn the new 'non slipping' diff, hmmmm improvement, the waaaaarrrrrggghhhh ching into gear reduced.....day 3(today)-jesus H christ I've got whiplash!! Its banging into gear like it used to, only slight hesitation but I think that will be cured with a little more ‘spirited’ driving tomorrow morning.

Will update tomorrow night with results, off to bed for an early start. :thumbs:

that`s a result if it`s cost you nothing mines in at bolton getting clutch flywheel etc unfortunatly its costing me £1800:bigcry:

Is that at a dealer mate? My local stealer has just quoted me £1140
for a new clutch a new flywheel and a smg software up date!

Ok People there is a problem that bmw are not going to sort now :bigcry:

If you tell BMW to take the box out for clutch slipping and you are willing to pay for it as long as the clutch is worn below the limit thats fine.

BUT and its a big BUT if it is within spec i want warranty or good will to pay.

Thats how to tell bmw you want the clutch sorted as all the CSLs i have seen
and thats a few with some at 54,000 miles and the clutch was fine but flywheel had burn marks on it warranty picked up the tab :thumbs:

Cheers Mark CSL

yes thats at williams and she said they`ve given me discount which one quoted you £1140 ill phone them tommorrow and get a writen quote and question the price.

ive asked to keep the clutch, what would you do if it looks ok and they still want paying, pay the bill then send the clutch to warrenty?

No tell them you want to see the clutch and fly wheel before they fit the new items then if its fine go for the warranty :thumbs:

Not a penny till you have seen it :supz:

This could just be the tight Scot in me

Mine is showing sign's of this, didn't want to but might have to get it into Andy at Murkett's before the Ring/Spa trip, don't want to kill it over there!

My problem is the next inspection is due in around 5k miles and it's the bloody big one so I'll be getting it all done at once! lol

You won't kill it - it will get worse but I don't believe anyone has actually broken their car by carrying on driving it with the clutch slur?

ok, had another drive in it today, its miles better, almost sorted (more driving required), its also curred the lumpy setting off from stand still, when pulling away from the lights it would take sort of two attemps to get the clutch in, now its there first time.

I was quoted £1,225 for a new clutch, diff was done under warranty, i love the warranty.

If you have warranty get the diff replaced first and go from there, its sorted mine!

:beer:

Is clutch slur the same as clutch judder? I have noticed that from 4th to 5th and even more so from 5th to 6th there is a certain vibration on up shifts - sounds like a muffled burrrrrrrgh.

Do I have the same issue?

Kp

That doesn't sound good...!

Answer to your question- no

Sounds like you have an issue, do you have warranty?

Yes but I dont get it all the time, just every now and again.

Kp

If you have warranty get it in anyway,better be safe than sorry.;)

I get this shudder in the same way when changing up in the higher gears, had thought it was a clutch slip issue as coming close to 36K mile mark... Does anyone know what this is if not clutch slip? (I dont have warranty..)

So what does clutch slip feel like as my clutch looks like it has already been replaced under warranty.

I am sure this is what I am suffering with. As soon as I up shift on full throttle from 4th to 5th or from 5th to 6th rather than getting a full on bang from the rear of the car with the solid thump you get from shifting. I get half a thump and what sounds like a muffled purr and a decrease in in power just like a clutch slipping - then the power starts to build again.

Kp

Yeah,that sounds like mine,clutch slur,dont seem to get it in 123.:bigcry:

Yep 1st, 2nd and 3rd all seem fine: so what's the best course of action?

Kp

Have you tried in S6?

No. What difference will using S6 make. Surely that will just deliver an even more aggressive gear change? Or am I about to be hit with a "use the search function" icon.

Thanks

Kp

Its not a bad idea to do a search,thers is loads of info on here about it.;)

Well after the new diff (not new clutch, same clutch for 45k so I am aware) its back to its best, with the new diff there was an instant improvement, not perfect although using the trick of driving in S2 and flooring the pedal between up shifts has sharpened it up no end (recommended on here), still slurs a tiny bit when you are in the full torque band 4th to 5th to 6th but I think that’s just how they are (although does improve with the pedal to the floor trick, I forget to do it sometimes).

Turn DSC off, gear change to max, nail it and see if it slurs, if not the clutch/diff is ok and it’s just the software for the lower settings (it must be). Mine still slurred with this so it must have been the diff.

Just my experience, many many more opinions on here ! Reading on here and my own experience I do think the software is to blame most of the time….although a new diff did fix mine…..

I was going to sell, but now keeping for a while as it’s awesome again.
:thumbs:

Im off to Murketts for a new clutch and fly wheel,and hoping the slur goes[probably come back in time];)