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Hi all. I have a C5 Z06 with an A&A SC on it. I’ve developed a metallic “whirring” noise and it’s getting harder to shift into 1st and 2nd gear. The car has 39000 miles on it with approx 10,000 with the blower. The car has always been street driven and never abused however I do get into the boost fairly frequently.
The noise is hard to locate but it does not sound like an differential howl. The noise increases with acceleration and disappears when the clutch is pushed in and is more prevalent in 1-3 gears.
I hate to start throwing money at it without really knowing what causing it. Any help with diagnosing the problem would be appreciated.
These are the hardest things to diagnose. The torque tube transfers noises from front to back. I ad a noise that caused shifting problems and it sure sounded like it was coming from the back but turned out to be a bad pilot bearing. Good luck.
Here are my suggestions. If you haven't already, check the easy stuff first.
- Fluid in master cylinder low?
- Master cylinder leaking on either side of firewall
- Remove clutch inspection plate and have a look at things. Notice anything out of ordinary, or any leaks from slave cylinder?
Are you still on the stock clutch? Might be time for an upgrade. Especially considering the added power and torque hitting those components.
Here are my suggestions. If you haven't already, check the easy stuff first.
- Fluid in master cylinder low?
- Master cylinder leaking on either side of firewall
- Remove clutch inspection plate and have a look at things. Notice anything out of ordinary, or any leaks from slave cylinder?
Are you still on the stock clutch? Might be time for an upgrade. Especially considering the added power and torque hitting those components.
Thanks for the suggestions- I will do that. It is the stock clutch and it has faired well until now. I'm just hoping its the clutch and not the trans.
I've done a lot of reading and it seems there is just about as much negative feedback as positive feedback on every clutch I've looked at. That being said, I'm open to suggestions. I was looking at a Monster Twin disk setup from Tick. A&A suggested Centerforce DYAD but Tick advised against it???? Please comment with your experiences.
I think you're probably right. What did you replace with and how do you like it?
Pilot bearing was shot clutch shot. So I replaced everything with a mantic twin.. Tearing everything out sucks lying on your back. It's done and everything working good.
chargermd, your assessment of the varying opinions about clutches is spot on. I had one shop tell me to go with an LS7 clutch. Then I called another shop and they laughed at the idea of putting an LS7 clutch in my C5. Both reputable shops. In the end, for my application, I went with a Monster Level 2 (single disc) and lightweight aluminum flywheel. I have approximately 500 miles on this setup with no issues. The pedal feels very close to stock and this clutch is advertised to handle up to 550RWHP.
If you are set on a twin disc setup, Mantic is a solid choice and so are the McCleod RST's.
You will drive yourself nuts listening to all of the opinions on clutches (and other such parts). Narrow your choices down to two. Then do research on those two only. Then make a decision. At the end of the day, either find a reputable shop to do the install, or take your time and be meticulous about the install on your own. Oftentimes, post clutch install issues have more to do with the installer or installment rather than the clutch itself.
I just did the clutch install last month in my garage on jack stands. It's very doable if you have the time, space and tools to complete the job. If you decide to do it on your own, PM me for any specific questions. I'd be more than happy to help.
Pilot bearing was shot clutch shot. So I replaced everything with a mantic twin.. Tearing everything out sucks lying on your back. It's done and everything working good.
Congrats on the install. How long did it take you doing in on jack stands?
Install took about a week because I started before I had all of the parts. Plus I took a day trip to MD to have Rick at RKT Performance rebuild my t56. He came in on a Sunday and rebuilt it all in one day.
I installed new torque tube bearings and GM couplers. I purchased the bearings from a store called: Bearings, Belts and Chains. I had a local machine shop press off the old ones and install the new ones.
I took my time as this is not a daily driver.
Here’s some pics (in no particular order). If you want, PM me a phone number and a good time to call and we can chat before you get started. I’m happy to help.
Your pictures bring back memories. I had Rick do my T56 too. I didn’t remove the bell housing though. Looked like too much of a pain to get at all the bolts.
Your pictures bring back memories. I had Rick do my T56 too. I didn’t remove the bell housing though. Looked like too much of a pain to get at all the bolts.
Might be the angle of the pic, but I didn’t remove the bellhousing either for the same reasons you didn’t.
chargermd, your assessment of the varying opinions about clutches is spot on. I had one shop tell me to go with an LS7 clutch. Then I called another shop and they laughed at the idea of putting an LS7 clutch in my C5. Both reputable shops. In the end, for my application, I went with a Monster Level 2 (single disc) and lightweight aluminum flywheel. I have approximately 500 miles on this setup with no issues. The pedal feels very close to stock and this clutch is advertised to handle up to 550RWHP.
If you are set on a twin disc setup, Mantic is a solid choice and so are the McCleod RST's.
You will drive yourself nuts listening to all of the opinions on clutches (and other such parts). Narrow your choices down to two. Then do research on those two only. Then make a decision. At the end of the day, either find a reputable shop to do the install, or take your time and be meticulous about the install on your own. Oftentimes, post clutch install issues have more to do with the installer or installment rather than the clutch itself.
I just did the clutch install last month in my garage on jack stands. It's very doable if you have the time, space and tools to complete the job. If you decide to do it on your own, PM me for any specific questions. I'd be more than happy to help.
Thanks so much for your feedback. Looks like I'll be changing a clutch soon.
I' m leaning towards the Monster setup because I've seen more positive reviews than negative and have had a couple vendors recommend them.
I too will doing this on jack stands so I will PM you with some specific questions.
Thanks so much for your feedback. Looks like I'll be changing a clutch soon.
I' m leaning towards the Monster setup because I've seen more positive reviews than negative and have had a couple vendors recommend them.
I too will doing this on jack stands so I will PM you with some specific questions.
I used a Monster and am very happy with it. The guys at Monster are also very helpful with questions.
01-21-2019, 02:43 PM
Help with Transmission vs clutch noise
