Clutch Disk Replacement

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no_spam@nordquist.us - 16 Mar 2007 09:06 GMT

I have a 2005 Silverado 2500HD with the Duramax Diesel & the 6sp
manual transmission. The 6sp manual may be a bit old fashioned, but I
enjoy driving it.

I tow a 13,000 pound 5th wheel RV behind the truck about 1/2 of my
mileage.
The dealer tells me that I can expect a clutch replacement at about
100,000 miles. He will use Chevy's standard repair kit with the
standard clutch disk.

I want to know if there is an extra heavy duty clutch disk available
for my truck. I'd prefer a genuine Chevy part, but a reliable
aftermarket part would also be ok.

Does anyone know of an extra heavy duty clutch disk that will fit my
truck?

Thanks in advance for your help.

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SnoMan - 16 Mar 2007 13:45 GMT

>I have a 2005 Silverado 2500HD with the Duramax Diesel & the 6sp
>manual transmission. The 6sp manual may be a bit old fashioned, but I
[quoted text clipped - 14 lines]
>
>Thanks in advance for your help.

GM redsigned the clutch and flywheel in the summer 2005 for 06 models.
(the Dmax is a externaly balanced motor with a "laminated" flywheel of
sorts because of this) The new flywheel and clutch will retrofit on
older Dmax. If you do replace it, do use the upgraded parts This aside
you need to remember that with any high torge engine, you do not want
to slip the clutch much at all or play it iunder load because a lot of
heat is generated from this. Keep RPMs low and get full engagement as
soon as possible and use a deeper gear to avoid playing clutch (this
is why semi have such deep first gears so they can get rolling with
little clutch action because you can fry one quick in one of them if
you try to play the torque in a higher gear slip it too much under a
high load)
-----------------
TheSnoMan.com

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Big Al - 16 Mar 2007 15:42 GMT

> >I have a 2005 Silverado 2500HD with the Duramax Diesel & the 6sp
> >manual transmission. The 6sp manual may be a bit old fashioned, but I
[quoted text clipped - 29 lines]
> -----------------
> TheSnoMan.com

Your Duramax has a low first gear too. Use it. And like Snow said, don't
slip the clutch. Get the clutch out, then add the torque. You can easily get
over 100K miles out of it.

Al

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no_spam@nordquist.us - 16 Mar 2007 20:30 GMT

>From a standing start, I routinely use 2nd gear when I'm on a level

road with little or no load in t he truck. If I'm on a steep hill or
heavily loaded I always use 1st gear to get moving. Slipping the
clutch seems to be a dumb thing to do except when I have a fully
loaded truck, 13,000 lb trailer, and starting off on a hill. Then a
small amount of slipping seems necessary. I stress a small amount.

My clutch failed towards the end of 2005 with about 12K miles on the
truck. The repair was under warranty and amounted to replacing the
flywheel with an upgraded version. The fix was to "Replace the
flywheel assembly with a Dual-Mass Flywheel, P/N 24232434." This
quote is from Bulletin 04-07-31-006A. Would this have been the
redesigned flywheel your message referred to?

Dave

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SnoMan - 16 Mar 2007 21:28 GMT

>My clutch failed towards the end of 2005 with about 12K miles on the
>truck. The repair was under warranty and amounted to replacing the
>flywheel with an upgraded version. The fix was to "Replace the
>flywheel assembly with a Dual-Mass Flywheel, P/N 24232434." This
>quote is from Bulletin 04-07-31-006A. Would this have been the
>redesigned flywheel your message referred to?

I need to recheck my data as it could have been June 2004 when they
did it but I am thinking June 2005. I never read the bulliten but I
did read about it before it went to bulletin. (I read some inside
industry news a lot and try to watch for the things they change but do
not talk about) The old flywheel was a dual mass too and they had
problems with the rubber layer between the masses (kinda like a
harmonic balancer does) breaking down from heat from people cooking
the clutches. I once saw a guy cook one on a Dmax playing around with
trying to crawl over big curb in second gear in 4x4 from a stand still
while resting front tires against it. It did not take long. If he had
used 2wd it would have likely just spun tires and saved clutch (or if
he had used 1st or low range )
-----------------
TheSnoMan.com

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Big Al - 17 Mar 2007 15:25 GMT

> My clutch failed towards the end of 2005 with about 12K miles on the
> truck. The repair was under warranty and amounted to replacing the
[quoted text clipped - 4 lines]
>
> Dave

Dave,

What happened when the clutch failed? You were doing what with the truck?

Al

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no_spam@nordquist.us - 22 Mar 2007 02:11 GMT

> > My clutch failed towards the end of 2005 with about 12K miles on the
> > truck. The repair was under warranty and amounted to replacing the
[quoted text clipped - 10 lines]
>
> Al

The failure occurred before I bought the 13,000 lb RV. In the winter
mornings as my wife & I went to work, I'd let the engine idle with the
heater running to keep her warm as I went into a deli to buy
breakfast.

I noticed that with the transmission in neutral, when the clutch pedal
had been almost fully released - past the engagement point, but just
before I took my left foot off the pedal, I'd get a really horrible
rattle out of the clutch. I wasn't doing anything - the truck was
just idling with the heater running.

Dave

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Big Al - 23 Mar 2007 00:54 GMT

> > > My clutch failed towards the end of 2005 with about 12K miles on the
> > > truck. The repair was under warranty and amounted to replacing the
[quoted text clipped - 23 lines]
>
> Dave

That's interesting. Snoman was probably right about the flywheel coming
apart. Some friend of mine was trying to impress me with his Duramax so he
took off from a dead stop in third with a trailer and a back hoe. Killed the
flywheel. But I think it should have:)

Al

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