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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Mon, Nov-23-2009, 08:36:17 PM   #21
e46badboy
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Originally Posted by doozyj View Post
I think the shudder is a common issue probably due to the software.
Really, why is that?
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Old Mon, Nov-23-2009, 09:05:02 PM   #22
Crayola
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I think the shudder is a common issue probably due to the software and not because of the clutch.
that's good to know because I've been noticing this a lot too especially on inclines
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Old Mon, Nov-23-2009, 09:14:01 PM   #23
Michalek0915
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that's good to know because I've been noticing this a lot too especially on inclines
Yeah the shuddering can go from very mild to very severe at times. sometimes when I start off in 2nd gear the shudder can last 3-5 seconds before the clutch engages entirely, but rest assured BMW told me and confirmed that this is completely normal as my car was recently in for service and everything checked out. Kind of annoying but common is what I've come away with.
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Old Tue, Nov-24-2009, 02:24:29 PM   #24
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Originally Posted by Just1ntym View Post
that's good to know because I've been noticing this a lot too especially on inclines
Tell me something, how can software cause shudder?

Software has nothing to do with shudder AT ALL.

These are issue that may cause shutter on SMG trans.

A. Low clutch disc.
B. A bad clutch Slave
C. A bad SMG hydro pump.
D. SMG pump need to rebleed or maybe low hydro fluid.

If it had software issues then the SMG control unit would have recognize
d the problem likely be throwing gear position codes.
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Old Wed, May-07-2014, 06:48:52 PM   #25
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Default Re: SMG Clutch

Quote:
Originally Posted by e46badboy View Post
Tell me something, how can software cause shudder?

Software has nothing to do with shudder AT ALL.

These are issue that may cause shutter on SMG trans.

A. Low clutch disc.
B. A bad clutch Slave
C. A bad SMG hydro pump.
D. SMG pump need to rebleed or maybe low hydro fluid.

If it had software issues then the SMG control unit would have recognize
d the problem likely be throwing gear position codes.
I stumbled on this old thread, researching expected SMG clutch life.. and didn't want to leave this ending with this comment.

While I don't disagree those areas can cause problems, I am proof that it CAN be SW.

I opened up INPA and reset my SMG's brain... FELT LIKE A NEW CAR.

My presumption is that the computer measures tolerances, in this case the gap it perceives between the clutch and the pressure plate, and as the clutch wears thinner, it doesn't re-adjust for that increased gap.

If my presumption is correct, which my findings so far would agree with, then you CAN certainly get rid of this shudder with a hard SMG reset via INPA.
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Old Wed, May-07-2014, 07:22:50 PM   #26
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Default Re: SMG Clutch

Quote:
Originally Posted by cbaty08 View Post
I stumbled on this old thread, researching expected SMG clutch life.. and didn't want to leave this ending with this comment.

While I don't disagree those areas can cause problems, I am proof that it CAN be SW.

I opened up INPA and reset my SMG's brain... FELT LIKE A NEW CAR.

My presumption is that the computer measures tolerances, in this case the gap it perceives between the clutch and the pressure plate, and as the clutch wears thinner, it doesn't re-adjust for that increased gap.

If my presumption is correct, which my findings so far would agree with, then you CAN certainly get rid of this shudder with a hard SMG reset via INPA.
What is INPA?
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Old Wed, May-07-2014, 07:37:49 PM   #27
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Default Re: SMG Clutch

Quote:
Originally Posted by cbaty08 View Post
I stumbled on this old thread, researching expected SMG clutch life.. and didn't want to leave this ending with this comment.

While I don't disagree those areas can cause problems, I am proof that it CAN be SW.

I opened up INPA and reset my SMG's brain... FELT LIKE A NEW CAR.

My presumption is that the computer measures tolerances, in this case the gap it perceives between the clutch and the pressure plate, and as the clutch wears thinner, it doesn't re-adjust for that increased gap.

If my presumption is correct, which my findings so far would agree with, then you CAN certainly get rid of this shudder with a hard SMG reset via INPA.
I need to get this done... the shudder is really annoying and I know it's not clutch slip from glazed pucks since it hooks up nice and solid on an S6 shift from 7-8K rpm.

Anyone know how much a dealer charges for an SMG reset? or if there's someone who can do this in the Fraser valley/lower mainland area?
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Old Wed, May-07-2014, 07:38:27 PM   #28
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Default Re: SMG Clutch

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Originally Posted by Lola's Dad View Post
What is INPA?
Check out the coding subforum.


I need to find the proper procedures for SMG reset via INPA and try it out on mine.
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Old Thu, May-08-2014, 01:18:57 AM   #29
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Default Re: SMG Clutch

Mine has 124k reset via inpa and still shudder. Replaced along with flywheel and compression springs.
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Old Thu, May-08-2014, 02:03:50 AM   #30
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Default Re: SMG Clutch

mines at 97000km and going strong.

i have a shitty steep driveway to reverse out of every day and it performs like a champ, on my last car that was a MT it would be nearly impossible to reverse out of without frying the clutch. SMG does it no dramas
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Discussing SMG Clutch in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)