daniells7

Hello everyone. I bought my 09 c6z 2 Months ago it's has 35k miles. its making a knock noise. every time I pull it out of gear l And release the clutch. It only knocks when pulled out of gear into neutral is this a comon problem ? obviously it's something to do with the clutch. but the vehicle runs fine except for some bouncing between shifts. don't think its my driving I had many manual vehicles so. if anybody has this same problem or knows about the problem please help thanks have a nice day

double06

Does the knock only occur when say you are at a stop light and you pull out of gear and your foot is off clutch pedal? If this is true and you do have an aftermarket clutch you have one with a light flywheel and they are known to "chatter" at a stop light with your foot off clutch pedal.

Landru

No help but I'm wondering if it's clutch related, a'tall.
Your description of a "knock" bothers me, never heard the term related to clutches et al.

Any code(s)??
Any parts store will have an OBDII reader, will plug-in & tell you if there're any registered.
IF there is it may very likely lead you to the issue. Nothing to lose.

Otherwise it's off to the dealer. G/L

daniells7

No codes no engine light

NiteriderFRC

Drivetrain on these cars tend to be quite noisy. I'd also Look into faulty hydraulics. GM put out a voluntary recall on the Clutch Master Cylinder late last year.

Jerry's aclt1

I also have a 2009 Z06, but have not experienced what the OP has explained.

Landru

Would a failing torque tube bearing cause a clutch to clunk?
JMHO but this needs to be looked at by a Corvette pro. 'Clunk' has to be duplicated for a tech, once isolated which way to aim is known & can be dealt with.

G/L man, take it to a good indy shop ideally specializing in Corvettes & specifically C6. Have to learn for sure source of this clunk or you'll be left chasing rabbits down holes time-wise & dropping $ at every step along the way. Someone can/has to properly diagnose this up front & personal.

sushistrip

Did you ever resolve this issue? I'm having nearly identical symptoms on my 2011 Z06

phipp85

The problem above sounded like an aftermarket solid hub clutch like someone else stated.
Stock clutch on yours?

Undy

A lot of the dual disk clutches have a rattle/knock at idle in neutral. Perhaps your Z has had a clutch change?

sushistrip

Aftermarket clutch on mine. LS9 clutch and aluminum flywheel. I started it up the other day and it made zero noise on cold start. After driving it around, get back and let it idle in the garage I could very faintly make it out. Put my head on the ground and tried to listen for it under the car and couldn't hear anything.