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Old Oct 12, 2012 | 12:04 AM
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Had a doc appt with chevy today for a clutch flush and called and said my harmonic balncer had started to wooble. i looked for my self and it was also had a chirp earlier in the month real bad changed belt and it went away but came back few weeks later. should i stick with the gm replacment pulley or go aftermarket its my dd by the way its a o6
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Old Oct 12, 2012 | 01:01 AM
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Unless you have extended warranty to cover it I'd go aftermarket. Most likely dealer will not install aftermarket though.
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Old Oct 12, 2012 | 03:23 AM
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OP: I would just have an ATI unit installed and never worry about it again. The OEM unit is junk and to replace junk from GM with more junk from GM does not sound like a good idea to me. http://www.atiracing.com/products/dampers/index.htm
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Old Oct 12, 2012 | 03:44 AM
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crank** pin that thing.. i have mine come off 4 times before destroying the crank at 25k miles

Last edited by Wild; Oct 12, 2012 at 03:52 AM.
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Old Oct 12, 2012 | 06:24 AM
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Originally Posted by Gering
OP: I would just have an ATI unit installed and never worry about it again. http://www.atiracing.com/products/dampers/index.htm
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Old Oct 12, 2012 | 08:52 AM
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The Balancer is now manufactured by a different vendor, so a GM replacement should be fine. I have also confirmed this when speaking with Steve Grilli

Originally Posted by Gering
OP: I would just have an ATI unit installed and never worry about it again. The OEM unit is junk and to replace junk from GM with more junk from GM does not sound like a good idea to me. http://www.atiracing.com/products/dampers/index.htm
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Old Oct 12, 2012 | 09:39 AM
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Originally Posted by ricknyc23
The Balancer is now manufactured by a different vendor, so a GM replacement should be fine. I have also confirmed this when speaking with Steve Grilli
I wont believe that until I see a new part number thats different from whats been used so far.
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Old Oct 12, 2012 | 09:51 AM
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Originally Posted by ricknyc23
The Balancer is now manufactured by a different vendor, so a GM replacement should be fine. I have also confirmed this when speaking with Steve Grilli
Do you know when production of the new balancers was started and when they phased out the old units for production? I believe there have been posts of bad balancers from new 2013 owners.
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Old Oct 12, 2012 | 02:24 PM
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I have a pinning kit from my supercharged LS1 Z28 past life. Does that prevent this from happening ?
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Old Oct 12, 2012 | 06:09 PM
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ATI damper is the way to go.
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Old Oct 15, 2012 | 12:26 AM
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I'd like to know if a 9/17/11 built '12 GS has the good or bad balancer. Is there any way to know? Thx.
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Old Oct 16, 2012 | 03:21 AM
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Just fyi,,,,,,GM told me they were not supporting there balancer on any ls2 and they would have a replacment in a year.
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Old Oct 16, 2012 | 04:07 AM
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Originally Posted by BadgeZ28
I have a pinning kit from my supercharged LS1 Z28 past life. Does that prevent this from happening ?
No. It's almost always the balancer pulley section wobbling relative to its hub section through the rubber interface. The hub is still on tight.
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Old Oct 16, 2012 | 04:13 AM
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Figures i checked my warranty and it went out 2,000 miles ago :-/ time to do it right this time i guess.
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Old Oct 16, 2012 | 07:33 AM
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Originally Posted by 1fastbob
ATI damper is the way to go.
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Old Oct 16, 2012 | 08:00 AM
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Originally Posted by Gering
OP: I would just have an ATI unit installed and never worry about it again. The OEM unit is junk and to replace junk from GM with more junk from GM does not sound like a good idea to me. http://www.atiracing.com/products/dampers/index.htm
I got a '12 GS. Information overload for a noob like me. Which ATI unit to get?
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Old Oct 16, 2012 | 09:13 AM
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Originally Posted by ricknyc23
The Balancer is now manufactured by a different vendor, so a GM replacement should be fine. I have also confirmed this when speaking with Steve Grilli
what year did they change?
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Old Oct 16, 2012 | 09:35 AM
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Old Oct 16, 2012 | 09:38 AM
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Originally Posted by chsia
I got a '12 GS. Information overload for a noob like me. Which ATI unit to get?
Sir,

Here is a list of all the GM Dampers http://www.atiracing.com/products/da...s/damchevy.htm your best bet is to give them a call, I do not want to give you bad info.
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Old Oct 16, 2012 | 09:41 AM
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Originally Posted by Dngnhack
Figures i checked my warranty and it went out 2,000 miles ago :-/ time to do it right this time i guess.
That happens to me a lot as well, I had Victor at http://corvettesofhouston.com/ install mine many many miles ago, so far so good.
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