Vibration after clutch install
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Joined: Mar 2008
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From: Warwick RI
Vibration after clutch install
My friend's 2005 heads/cam corvette has a bad vibration after having a clutch installed. he has an aluminum flywheel and a carbon-ceramic clutch. There's a good amount of vibration when you rev it up in neutral and most noticeable on the highway around 4k rpm in 4th gear. any ideas what could be wrong?
Safety Car
Joined: Aug 2006
Posts: 4,347
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From: Apache Junction AZ
My friend's 2005 heads/cam corvette has a bad vibration after having a clutch installed. he has an aluminum flywheel and a carbon-ceramic clutch. There's a good amount of vibration when you rev it up in neutral and most noticeable on the highway around 4k rpm in 4th gear. any ideas what could be wrong?
BJK
Team Owner
Joined: Mar 2001
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From: Virginia Beach
CI 3-5-6-7-8 Veteran
You need to match balance the new clutch to the stocker... not to be misunderstood as zero-balancing. At final engine balance if the motor is off at all they'll install an off-balanced flywheel/clutch assembly to bring it w/ in spec. If you have one of these motors and install a zero balanced clutch you will induce a nasty vibration.
Happened to me... of course there are times new clutches just plain come out of balance even when every mfg. says they take great care to zero-balance them.
Happened to me... of course there are times new clutches just plain come out of balance even when every mfg. says they take great care to zero-balance them.
Le Mans Master
Joined: Sep 2004
Posts: 6,714
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From: Providence RI
I've driven this car with the bad vibration. It's REALLY BAD. I could be wrong but it's hard to believe that the WHOLE car could vibrate because the flywheel/clutch/pressure plate isn't perfectly balanced.
Safety Car
Joined: Nov 2005
Posts: 3,835
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From: Grand Junction Colorado
I had a balencer go south last summer and I swore the torque tube and driveshaft came outta the car.This same car had the clutch installed wrong the day before.They bad clutch caused the balencer to go bad.Good luck.
Safety Car
Joined: Nov 2007
Posts: 4,436
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From: Bay Area CA
When I did my clutches on my 72 Z28, I had the clutch assembly (pressure plate) and flywheel balanced together and never had any vibration.
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Remove the new clutchand flywheel, check to see if it's balanced perfectly. If it is, then your OEM flywheel was used to balance the OEM rotating assembly and your new flywheel will have to be balanced in the EXACT way your OEM unit was. However, this is very unlikely as I don't think GM even has the capability to balance in this way (lots of aftermarket engine builders do this as a last ditch effort to balance a rotating assembly).
You better believe an out of balance clutch assembly will make the ENTIRE car vibrate like crazy! (and I would advise you don't drive this car ANYMORE until this is fixed. Said vibration is EXTREMELY rough on on moving parts in your engine)!
I recently sheered 2 of 3 of my torque tube bolts off the rubber grommet that connect the driveshaft to the clutch. Car vibrated like crazy in octaves above 1800 RPM. Thought it was my tranny. Replaced tranny, put it all back together, and started it up. Same problem. Absolute heart-breaker ( this is a 20 hour job on a TT car!!). Tore it all apart again (including torque tube this time) and found the sheered bolts. Oh, that was a fun day!
Point of the story above? Hang in there, it could always be worse!
You better believe an out of balance clutch assembly will make the ENTIRE car vibrate like crazy! (and I would advise you don't drive this car ANYMORE until this is fixed. Said vibration is EXTREMELY rough on on moving parts in your engine)!
I recently sheered 2 of 3 of my torque tube bolts off the rubber grommet that connect the driveshaft to the clutch. Car vibrated like crazy in octaves above 1800 RPM. Thought it was my tranny. Replaced tranny, put it all back together, and started it up. Same problem. Absolute heart-breaker ( this is a 20 hour job on a TT car!!). Tore it all apart again (including torque tube this time) and found the sheered bolts. Oh, that was a fun day!
Point of the story above? Hang in there, it could always be worse!
