[s-cars] drivetrain whir / clatter upon CMG install

[Krasusky Paul (WQQ2PXK)]

Thanks Trevor.

Sounds like Bill likely got an old unit then.  Doubt he'll take it out,
would make his 4th tranny install(!).

I'm leaning toward yanking it (if only to keep up with Bill).  Here's some
observations experienced this morning:

At idle, clutch out, if I apply pressure to the shifter toward any gear and
just hold it there, idle clatter is GONE.  More worrisome, while taking a 90
degree right turn onto on ramp, cut wheel hard and hit throttle, I get a
good drivetrain whir for a second, goes away as soon as either steering
input is reduced or load is off that LF axle (seems to be steering / load
related).  Through a 180 degree ramp, I can feed in steering and get the
noise, then back off, goes away, repeatedly as I saw the wheel back and
forth, through the curve.

Thoughts?

Thanks again.  Hopefully I can convince Rossato and Platt it's in their best
interest to assist me with the pull 8-).

Hey, you get your issues sorted post One-Lap?

-Paul hoping this doesn't turn into the soap opera it's sounding like K.
'95 //S6 fun until she blows...  usually that's the other way around ain't
it?



-----Original Message-----
From: Trevor Frank [mailto:tfrank at symyx.com]
Sent: Wednesday, November 05, 2003 6:14 PM
To: Krasusky Paul (WQQ2PXK)
Subject: RE: [s-cars] drivetrain whir / clatter upon CMG install


Hmm, an old spec clutch set up?  I remember some mention of them once
sending them out without a sprung clutch and having some issues with
them.  I don't believe I have any idle clatter. I wonder if it is an
improperly set pressure plate to clutch disk distance. I know that they
complained some flywheels where not being made to stock specs, and
therefore there preload was wrong.  This could, I guess, extend to
having it to close to the clutch disk?  I also wonder about the through
out bearing and if it is properly attached to the arm. May also be the
slave cylinder isn't working properly.  I replaced mine and noticed a
huge improvement in clutch feel and effort so they definetly go bad.

I would give Spec a call.

-----Original Message-----
From: Krasusky Paul (WQQ2PXK) [mailto:WQQ2PXK at ups.com]
Sent: Wednesday, November 05, 2003 9:09 AM
To: Trevor Frank
Subject: RE: [s-cars] drivetrain whir / clatter upon CMG install

Yes, mine is.  Oddly enough though, Bill Mahoney got a III from them
that was not.  Weird.

What are your thoughts on the idle clatter?  TOB or nature of the beast?
Or other?

I'm likely just going to 'wait and see'...  I'm getting 50/50 responses
on this, some have the clatter, 10k on the install, some have none.  So
bizarre.

Thanks though.

-Paul


-----Original Message-----
From: Trevor Frank [mailto:tfrank at symyx.com]
Sent: Wednesday, November 05, 2003 11:39 AM
To: Paul Gailus; Krasusky Paul (WQQ2PXK); s-car-list
Subject: RE: [s-cars] drivetrain whir / clatter upon CMG install



The spec clutch disk is sprung.

-----Original Message-----
From: Paul Gailus [mailto:gailus at mindspring.com]

Sent: Tuesday, November 04, 2003 10:37 PM
To: Krasusky Paul (WQQ2PXK); s-car-list
Subject: Re: [s-cars] drivetrain whir / clatter upon CMG install

Paulie,

It's possible that torsional vibrations are causing the
rattling noise at the splined connection between the
clutch disc hub and the transmission input shaft.
The OEM clutch disc doesn't have a torsion damper,
but the OEM flywheel does include a torsion damper
between the "dual masses"

If the SPEC clutch disc doesn't have a torsion damper
then this could be another factor contributing to the noise
(over and above the higher level of vibrations that get
through the LWFW).

Paul