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PostPosted: Thu Aug 19, 2010 12:18 pm 
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Posts like an LG3
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Joined: Thu May 22, 2008 10:29 am
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Location: Winnipeg, Manitoba
Year and Trim: 2000 SSEi
Every available option
viewtopic.php?f=18&t=20161

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Mark
The Familyman's Trans-Am
Intense 3.4 MPS, Intense FWI, Intense PCM, copper NGKs TR55's, MSD wires, MSD coils, BWD ICM, MagnaFlow High Flow Cat, drilled 180 'stat, solid front mount, Monroe Max Air rear shocks, Moog rear mounts, Moog suspension bushings, cleared front corners, 190,000 miles
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PostPosted: Thu Aug 19, 2010 1:21 pm 
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Joined: Wed May 13, 2009 10:45 pm
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Location: CHICAGO
Year and Trim: 2006 STS-V, 2004 GTO, 2009 G8 GT
Simple solution. Make sure all rotating pieces from bearing/hub, brakes, and wheels/tires are "true".

Never had such a problem so I voted: No, never had it.

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Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*

Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

Daily Drivers:
2019 Chrysler Pacifica Limited: Mommy's new RGC
2015 Chrysler Town & Country Limited Platinum: Kids new RGC
2007 Chrysler Town & Country Limited: Sold to neighbor
2009 Pontiac G8 GT: L76, Sport Red Metallic
2003 Chevrolet Suburban 2500: Doeskin Tan - 8.1L Big Block... new plow truck
1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck


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PostPosted: Sun Aug 22, 2010 7:01 pm 
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Posts like an L27
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Joined: Thu May 22, 2008 1:05 am
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Year and Trim: 2004 Bonneville GXP
1997 Oldsmobile LSS L67 - SOLD
Nope.
Had a good highway run last night. About 5 hours on the road, and no vibration. Actually made about 25 mpg on that trip too. :)

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2004 GXP - Greystone and stock

95 Oldsmobile 98 L36. 180 degree thermostat. Tru-Cool tranny cooler. Touring Sedan wheels. FE3 springs. Urethane End Links. Magnaflow Cat 94006 -> Soon to be replaced by something that works. WAI. Ported and polished LIM.
Mods coming soon - . Touring Sedan seats. TS Sway bars. - Sold

97 Oldsmobile LSS L67 - Stock. For now. - Sold


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PostPosted: Tue Aug 31, 2010 2:02 pm 
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Joined: Tue Aug 31, 2010 12:29 am
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Year and Trim: '04 Black GXP
Not usually but every once in a while it will shimmy but then it goes away....go figure.


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PostPosted: Thu Sep 02, 2010 10:02 am 
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Joined: Fri Jul 18, 2008 12:09 pm
Posts: 50
Year and Trim: 2005 GXP
Have I had the shimmy? Yes, several times. Was it ever not cured by having the tires balanced? No. Discount tire gives free balances for the life of the tire, and I take advantage of that (although granted it is a pain to take it in).

I think with the 18s, these cars are a bit more sensitive to tire balance issues. I've heard similar comments from the SRT guys with their 20s.

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PostPosted: Thu Sep 02, 2010 11:01 am 
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Location: MN/IA
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That and it's really hard to get a 0.00 balance with stick-on weights, as the GXP wheels have no bead to pound weights onto.

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PostPosted: Thu Sep 02, 2010 3:11 pm 
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Joined: Wed Aug 20, 2008 3:30 am
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Location: 95823
Year and Trim: '05 GXP
You can get 0.00 balance with stick on weights but only if the person applying said weights knows what the hell they are doing.

If I take you to 100 shops in the region of your choice we'd be lucky to find 10 that had somebody there who knew how to properly balance a tire (Discount/America's Tire would fall into the other 90 category).

The problem I find most often is that people are lazy and they do a "static balance" which only places a weight at the rear most edge of the wheel or directly behind the spokes. Their only balancing one plane.

If you do a 2 plane dynamic balance, which places weights behind the spoke as well as near the inner bead area, it closely replicates the balancing of steel wheels of days gone by. You are balancing 2 planes and when done properly there will be no vibrations at all (assuming that all other things are functioning correctly).

With modern computer balancers they have made it so that any moron can balance a tire but for more sensitive systems it still takes a brain to do it right.


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PostPosted: Thu Sep 02, 2010 6:44 pm 
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Joined: Wed May 13, 2009 10:45 pm
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Location: CHICAGO
Year and Trim: 2006 STS-V, 2004 GTO, 2009 G8 GT
This is the problem I have with Discount Tire here. The CV8-R wheels I have on the GTO are also a lipless wheel like our GXP's, and I've had to take my right front to them about 3 or 4 times to get the steering wheel to stop shaking, and I STILL think it's still a little out of balance.

If a *dang* COATS balancer wasn't so much, I'd buy my own. :D

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Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*

Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

Daily Drivers:
2019 Chrysler Pacifica Limited: Mommy's new RGC
2015 Chrysler Town & Country Limited Platinum: Kids new RGC
2007 Chrysler Town & Country Limited: Sold to neighbor
2009 Pontiac G8 GT: L76, Sport Red Metallic
2003 Chevrolet Suburban 2500: Doeskin Tan - 8.1L Big Block... new plow truck
1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck


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PostPosted: Fri Sep 03, 2010 4:18 am 
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Joined: Wed Aug 20, 2008 3:30 am
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Location: 95823
Year and Trim: '05 GXP
I stock Coats balancers. The cost isn't bad but the freight would kill you.


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PostPosted: Fri Sep 03, 2010 9:48 am 
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Joined: Wed May 13, 2009 10:45 pm
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Location: CHICAGO
Year and Trim: 2006 STS-V, 2004 GTO, 2009 G8 GT
How much (just out of curiosity). I know Garage Equipment Supply, where I bought my lift has them, as well as tire changers, but prices range variably. Yea, shipping would be a killer on anything like that.

Although the place I mentioned has a manual tire changer for about $100 and manual balancer for $55. Nothing fancy mind you.

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Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*

Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

Daily Drivers:
2019 Chrysler Pacifica Limited: Mommy's new RGC
2015 Chrysler Town & Country Limited Platinum: Kids new RGC
2007 Chrysler Town & Country Limited: Sold to neighbor
2009 Pontiac G8 GT: L76, Sport Red Metallic
2003 Chevrolet Suburban 2500: Doeskin Tan - 8.1L Big Block... new plow truck
1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck


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