SMG Clutch Slip

jonnysideways · 03-01-2014, 12:56 PM

Firstly Happy new all!

Quick question, is it usual to get a bit of clutch slip when going hard with you foot flat to the floor on the throttle when changing up gears say, 3rd > 4th > 5th under strain? My old SMG didn't didn't do this, but it was not an CSL, and was pre software upgrade.

I wondered if its just feathering the gear change, or if there's a setting / issue.

Clutch is only 30K old, but again, don't know if they get eaten up that quickly.

cheers in advance

John

**outnumbered** · 03-01-2014, 01:09 PM

You'll probably get a lot of conflicting answers on this

Mine is prone to doing it, but it seems to improve after a while if I drive hard and don't lift at all when changing. It's been like that since I've had the car, and seems to be common to many cars.

NZ_M3 has played around with SMG diagnostics/calibration more than most, so you might look for some of his earlier posts.

jonnysideways · 03-01-2014, 05:49 PM

This is what I was after ;0) cheers. John.

**Mike R** · 04-01-2014, 01:37 PM

Put it in S6 and it should stop doing it. If it does then you know that it has just adapted to the (slow) way you are driving it (due to the crap weather). Once the weather improves and you give it the berries again, it should re-adapt back to normal (IME).

jonnysideways · 06-01-2014, 12:50 PM

Thanks. S6 in this weather will be fun ;0)

**AlexGTT** · 06-01-2014, 06:10 PM

Take it out, warm her up and spank her. Full throttle, everywhich way.

Actually, solved a fair few problems that way....

NZ_M3 · 10-01-2014, 02:35 AM

The S6 method is a bad idea in my opinion.

The issue is in the SAC (self adjusting clutch plate) and the SMG adaptation. Overtime the SAC adjustment becomes out of sync with the SMG adaptation hence the slip you experience.

My experience with this is a simple clutch slip point recalculation under the GT1 which will usually solve it.

If it's really bad, then reset the longitudinal acceleration sensor also ... and always remember to reset the clutch curve

Gibbo · 08-07-2014, 01:11 PM

Quote:

Originally Posted by NZ_M3

The S6 method is a bad idea in my opinion.

The issue is in the SAC (self adjusting clutch plate) and the SMG adaptation. Overtime the SAC adjustment becomes out of sync with the SMG adaptation hence the slip you experience.

My experience with this is a simple clutch slip point recalculation under the GT1 which will usually solve it.

If it's really bad, then reset the longitudinal acceleration sensor also ... and always remember to reset the clutch curve

Hi m8

I am installed new clutch kit, flywheel, engine mounts, trans mounts on my SMG car which has CSL SMG software.

Should I be doing the above as per your guidelines or something difference?

I am told I will need to run the bleed system test, what is that?

cps · 31-10-2014, 09:51 PM

Hi wonder if you could advise, I have a CSL. I have clutch slip when changing down to accelerate. I can se the revs rise, drop and rise again in clutch traction. say 6th to 5th.
could someone clever advise if there is a clutch curve reset I can do without garage help using some combination of paddles/buttons etc?. Before I bought the car the diff was changed for a new one under warranty for a slur into gear, which sounds the same. I don't track it or drive it often. it has 52k on the clock, so not many miles on the clutch I guess.

if not and a dealer is required, would warranty approach ( i have warranty) or a trip to Bartlett be a best bet way to get help? I don't have the software shown in the clip below.

I don't post really just read .
thanks in advance

03-01-2014, 12:56 PM	#1
jonnysideways S4 - Getting the hang of it Join Date: May 2012 Location: North West Posts: 246 Casino cash: $1744	SMG Clutch Slip Firstly Happy new all! Quick question, is it usual to get a bit of clutch slip when going hard with you foot flat to the floor on the throttle when changing up gears say, 3rd > 4th > 5th under strain? My old SMG didn't didn't do this, but it was not an CSL, and was pre software upgrade. I wondered if its just feathering the gear change, or if there's a setting / issue. Clutch is only 30K old, but again, don't know if they get eaten up that quickly. cheers in advance John __________________ A hedge is better than a tree.

03-01-2014, 01:09 PM	#2
outnumbered S5, Sport Off, DSC M-track Join Date: Nov 2009 Location: Reading Posts: 731 Casino cash: $19587	You'll probably get a lot of conflicting answers on this Mine is prone to doing it, but it seems to improve after a while if I drive hard and don't lift at all when changing. It's been like that since I've had the car, and seems to be common to many cars. NZ_M3 has played around with SMG diagnostics/calibration more than most, so you might look for some of his earlier posts. __________________ Now with added SG CSL.

03-01-2014, 05:49 PM	#3
jonnysideways S4 - Getting the hang of it Join Date: May 2012 Location: North West Posts: 246 Casino cash: $1744	This is what I was after ;0) cheers. John. __________________ A hedge is better than a tree.

04-01-2014, 01:37 PM	#4
Mike R S6, Sport On, Traction Off Join Date: Dec 2010 Location: Norwich Posts: 1,585 Casino cash: $17591	Put it in S6 and it should stop doing it. If it does then you know that it has just adapted to the (slow) way you are driving it (due to the crap weather). Once the weather improves and you give it the berries again, it should re-adapt back to normal (IME). __________________ Mike R Sarcasm is just a free service I provide. Nordschleife, there's only two barriers to worry about - the ones on the left and the ones on the right . CSL number 044

06-01-2014, 12:50 PM	#5
jonnysideways S4 - Getting the hang of it Join Date: May 2012 Location: North West Posts: 246 Casino cash: $1744	Thanks. S6 in this weather will be fun ;0) __________________ A hedge is better than a tree.

06-01-2014, 06:10 PM	#6
AlexGTT CSL Register Uber-poster! Join Date: Apr 2008 Location: Herefordshire Posts: 4,374 Casino cash: $8572	Take it out, warm her up and spank her. Full throttle, everywhich way. Actually, solved a fair few problems that way.... __________________ CSL Register Alcoholics Anonymous Group Leader & Businessman of the Year '93! www.earleyengineering.com

10-01-2014, 02:35 AM	#7
NZ_M3 S5, Sport On, DSC M-track Join Date: Jun 2008 Location: Auckland, New Zealand Posts: 1,434 Casino cash: $13579	The S6 method is a bad idea in my opinion. The issue is in the SAC (self adjusting clutch plate) and the SMG adaptation. Overtime the SAC adjustment becomes out of sync with the SMG adaptation hence the slip you experience. My experience with this is a simple clutch slip point recalculation under the GT1 which will usually solve it. If it's really bad, then reset the longitudinal acceleration sensor also ... and always remember to reset the clutch curve Last edited by NZ_M3; 10-01-2014 at 02:39 AM.

31-10-2014, 09:51 PM	#9
cps Mode S1 - Starting Out Join Date: Mar 2013 Location: Berkshire UK Posts: 24 Casino cash: $953	clutch slip from 5th to 6th when using paddle shift Hi wonder if you could advise, I have a CSL. I have clutch slip when changing down to accelerate. I can se the revs rise, drop and rise again in clutch traction. say 6th to 5th. could someone clever advise if there is a clutch curve reset I can do without garage help using some combination of paddles/buttons etc?. Before I bought the car the diff was changed for a new one under warranty for a slur into gear, which sounds the same. I don't track it or drive it often. it has 52k on the clock, so not many miles on the clutch I guess. if not and a dealer is required, would warranty approach ( i have warranty) or a trip to Bartlett be a best bet way to get help? I don't have the software shown in the clip below. I don't post really just read . thanks in advance