Flywheel & Cluth Balance.
Thread Starter
Melting Slicks
Joined: Jun 2011
Posts: 3,116
Likes: 598
Flywheel & Cluth Balance.
Is it possible to check the balance of a flywheel / clutch assembly when removed from the engine, or does it need to be balanced with the motor.
Engine is a ZZ383 which requires a externally balanced flywheel.
If it can then I assume they would need to know what engine it will be used on and make sure it is weighted properly (off balance) for the given engine.
I have a vibration @ ~ 4200 RPM I don't like and I am thinking its the clutch / flywheel assembly. It happens in all gears and with the clutch pressed all in.
Engine is a ZZ383 which requires a externally balanced flywheel.
If it can then I assume they would need to know what engine it will be used on and make sure it is weighted properly (off balance) for the given engine.
I have a vibration @ ~ 4200 RPM I don't like and I am thinking its the clutch / flywheel assembly. It happens in all gears and with the clutch pressed all in.
Melting Slicks
Joined: May 2006
Posts: 2,369
Likes: 103
From: Centerville Louisiana
I tried changing out the clutch, u joints twice, had main driveshaft rebalanced, new bushing that holds reared nose up and changed one wheel shaft still have it . Also added some plates by the sombrero bushing above the rear end
Thread Starter
Melting Slicks
Joined: Jun 2011
Posts: 3,116
Likes: 598
I didn't see much help, but I have now removed the flywheel / clutch / pressure plate. Off to have someone check the balance.
I am not sure what to tell them, but I am also taking the original flex plate I used with the TH350 which didn't seem to have the problem.
Help!!!
I am not sure what to tell them, but I am also taking the original flex plate I used with the TH350 which didn't seem to have the problem.
Help!!!
Pro
Joined: Dec 2015
Posts: 578
Likes: 107
From: colo
If you have the clutch pushed in all the way and it still does it, I don't think your clutch assembly is the issue, because it is not transferring power at that point. If it is happening at 4200 rpm when you are sitting still, it probably has to do with the engine balance.
Thread Starter
Melting Slicks
Joined: Jun 2011
Posts: 3,116
Likes: 598
If you have the clutch pushed in all the way and it still does it, I don't think your clutch assembly is the issue, because it is not transferring power at that point. If it is happening at 4200 rpm when you are sitting still, it probably has to do with the engine balance.
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Le Mans Master
Joined: Sep 2003
Posts: 8,812
Likes: 2,029
From: eastern NC
How about your harmonic balancer? Have you been able to rule it out?
Is it neutrally balanced or is it also weighted as most externally balanced engines are? Is it possible it has moved on the ring?
Good luck... GUSTO
Is it neutrally balanced or is it also weighted as most externally balanced engines are? Is it possible it has moved on the ring?
Good luck... GUSTO
Le Mans Master
Joined: Jan 2006
Posts: 6,506
Likes: 139
From: Butler Pa
I didn't see much help, but I have now removed the flywheel / clutch / pressure plate. Off to have someone check the balance.
I am not sure what to tell them, but I am also taking the original flex plate I used with the TH350 which didn't seem to have the problem.
Help!!!
I am not sure what to tell them, but I am also taking the original flex plate I used with the TH350 which didn't seem to have the problem.
Help!!!
The clutch and pressure plate will need to be done by themselves with a neutral balance.
Thread Starter
Melting Slicks
Joined: Jun 2011
Posts: 3,116
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I am having the flywheel / Clutch checked for balance now compared to the flex plate when I had the TH350
Le Mans Master
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Thread Starter
Melting Slicks
Joined: Jun 2011
Posts: 3,116
Likes: 598
Le Mans Master
Joined: Oct 2007
Posts: 9,700
Likes: 3,469
From: Akron Ohio
2025 Corvette of the Year Finalist - Modified
2024 C5 of the Year Winner - Modified
2023 C5 of the Year Finalist - Modified
2022 C5 of the Year Finalist - Modified
St. Jude Donor '09-'10-'11
Not unless it was marked prior. I had one slip and showed like 45 degrees advanced. I believe the 0 degree mark lines up with the keyway typically but I cannot speak for all brand balancers.
Melting Slicks
Joined: Dec 2009
Posts: 3,233
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From: Thunder Bay
If the problem started when the automatic was replaced with the manual, I think its unlikely that the problem is related to the harmonic balancer. When I did this with my 383 I sent the flywheel and the ring gear/flexplate from the automatic to the balance shop with instructions to balance the flywheel the same as the ring gear. Worked for me. The flywheel I used was a neutral balance flywheel which I installed with a weight suitable for a 400. The whole arrangement was then balanced to make it identical to the ring gear.