Vibration - Team Camaro Tech
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post #1 of 6 (permalink) Old May 29th, 03, 05:18 PM Thread Starter
Join Date: May 2003
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I have a 69 Camaro with a 94 LT1 engine and a Richmond 6 speed. At 3500 RPM and above there is a vibration, sitting still or driving. I picked up a used flywheel at a swap meet (small dia bolt pattern) had it resurfaced and installed a new clutch assembly. Is there a balance problem with the flywheel as in internal vs external incompatibility. I don't know what the flywheel came from and have not been able to find a listing for the casting number. Due to other circumstances I have changed engines ('88 350 to the LT1)and the vibration is still present. Any ideas?
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post #2 of 6 (permalink) Old May 30th, 03, 07:26 AM
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Welcome to the best site on the web! [img]graemlins/thumbsup.gif[/img]

I'm sorry to say that I can't really definitively help with your problem, but it sounds like you are on the right track. Maybe someone else can pop in here and help.


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post #3 of 6 (permalink) Old May 30th, 03, 08:00 AM
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I don't also but when you are saying (small diameter bolt pattern) are you saying the flywheel had to be modified by making the bolt holes bigger?
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post #4 of 6 (permalink) Old May 30th, 03, 10:39 AM
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Same problem, 2 motors, same tranny ? Did you also use the same flywheel?.... might have that checked/replaced.

68 Camaro~LSx ~all motor
1.54 60'--6.95 @ 98.45 660'--10.96 @ 121.53
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post #5 of 6 (permalink) Old May 31st, 03, 06:37 AM
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One-piece rear seal 350's use a counterweighted (external balance) flywheel (with a neutral balancer). You should be able to see the cast-in offset weight on the forward face of the flywheel.

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post #6 of 6 (permalink) Old Jun 2nd, 03, 06:40 AM
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I've heard the 305 and 350 ballancing is just a touch different on the flywheel end, but i've never run into a problem with it..

late model iron flywheels have the following part numbers from GM for the 350"s follows...

12.75" is 14088650
the only thing i have at my fingertips is a casting number for the 14.0" flywheel that is 93433010N

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