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Unread 09-05-2018, 07:14 AM   #2291
mrr23
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Quote:
Originally Posted by Rich Z View Post
Meaning what?
meaning no noise, don't worry about it. probably just something minor.
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Unread 09-05-2018, 11:31 AM   #2292
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Originally Posted by mrr23 View Post
meaning no noise, don't worry about it. probably just something minor.
Yeah, you are probably right. Probably just the Centerforce clutch being noisy when it wants to. Just wish I could find someone I could trust to at least diagnose the problem, but that is proving to be extraordinarily difficult to do for some reason.

As best I can tell Greg Lovell at AntiVenom has fallen off the face of the earth.
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Unread 09-05-2018, 11:57 AM   #2293
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Well, as best as I can tell, a new clutch will run in the neighborhood of $1500-$3000 depending on who you get to do it. I was going to take my CTS V to East Coast Corvettes in Maryland until I found out that SS Performance would do it. I believe Mike quoted me $750 for the parts and $750 for the install. Dealer will likely be higher. Bottom line is you need someone who will still be in business and will stand behind their work. That's getting harder to do these days. The dealer is a safe bet most of the time if you can afford their prices.
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Unread 09-05-2018, 12:22 PM   #2294
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Yeah, I actually contacted the Service Lane Manager (George Bell) at Dale Earnhardt Chevy here in Tallahassee to ask about having Shane take a look at my car to see if he could figure out what is making the drivetrain noise. After his initial response that he would get with Shane and schedule a time to have me bring my car in, nothing.... A followup email also got no response.

Funny thing is that I had a salesman from them call me up claiming they wanted to buy my C6Z for a customer. Yeah, right. They can just kiss my ass..........
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Unread 10-31-2018, 04:12 PM   #2295
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Took the C5Z out for a ride today, and not a peep out of the drivetrain. That is twice in a row now I took the car out, and the drivetrain squeal didn't show up.

I have been working the clutch a bit more aggressively than I normally do, so perhaps that is having a positive effect.
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Unread 04-18-2019, 12:55 PM   #2296
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So the saga continues.....

The C5Z is up on a lift and the drivetrain is out.

The Centerforce Dual Friction clutch disk looks OK, but the pressure plate and flywheel have noticeable burn marks on them.










Of particular note is the amount of residue of *something* around the pilot bearing. Actually in this case, it is a pilot BUSHING.









There also appears to be some sort of wear striations inside the pilot bushing.

The portion of the torque tube input shaft that rides within the pilot bushing looks like this.




Appears to me that the pilot bushing is damaged. But whether that is the cause of the problem or the result of something else that damaged the bushing, not sure at this point.

I have been talking with RPM Transmissions, and apparently putting in a pilot bushing instead of a pilot bearing is not recommended.

So, the jury is still deliberating....
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Unread 04-18-2019, 12:59 PM   #2297
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Oh yeah, notice those apparent impact witness marks on that pilot bushing in the upper left hand quadrant? Not sure what caused that. Installation carelessness putting the bushing in, perhaps? Or perhaps putting the torque tube back in didn't go as easily and carefully as one would hope?

Perhaps the front bearing of the torque tube holding the input shaft got damaged when the torque tube was installed?

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Unread 04-18-2019, 06:05 PM   #2298
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Rich, those burn marks sure do look like high spots to me. Either that or casting errors where the temp of the metal was incorrect or something. BUT, the pilot bearing/bushing is a WHOLE 'nother issue. That DON'T look good at all.....
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Unread 04-18-2019, 08:23 PM   #2299
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My intention is to have all of the following replaced:
  • Pilot bearing (bearing this time, NOT bushing)
  • Flywheel
  • Clutch assembly
  • Throwout bearing/slave cylinder
  • Torque tube input shaft
  • Both torque tube bearings

The drivetrain is already out of the car, so no sense half stepping now.

I have been conversing with RPM Transmissions and the guy I have been talking with recommended that based on what he sees in the pressure plate and flywheel, that I NOT use an organic based clutch disk. I had been planning on using a McLeod RST clutch, but I will have to now consider using the RXT instead. He said he would not recommend the Centerforce clutch at all.
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Unread 04-19-2019, 12:24 PM   #2300
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Well, I'm feeling pretty confident that the pilot bushing is the cause of the drivetrain squeal. Seems to me back in 2012 when I was researching this, a lot of people were recommending using a pilot bushing instead of a pilot bearing on a C5 Corvette. Now it seems the reverse is true.

In any event, the burn marks in the clutch seem to indicate the Centerforce wasn't holding up as well as I thought. And I'm not really sure what brand and model I want to use right now. So I guess it is back to square one trying to figure out whose recommendation to go with. Problem is you can find good and bad reviews for every one out there it seems. Which is telling me that quality control from each of the manufacturers could use some improvement.

I sure as heck don't want to make another mistake here.
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