RM497Z06

Bear with me as this is my first post...ever.
This question is regarding a 2009 Z06.


After our last Autocross I noticed a clunk in stop and go Denver traffic when releasing the clutch.
Sounded and felt like a lose differential. I isolated the issue to the clutch I thought so checked out the forum and as the fluid was dirty thought I'd change it using the Ranger method....Thanks Ranger.


Anyway, I removed the fluid, added new, remembered to put the cap back on, and pumped the clutch. I repeated several times. Just to make sure I was circulating the fluid I started the car and when I pressed and then released the clutch peddle the clunk was there (car was in neutral). I could hear it and lightly feel it, so thought it might be a linkage issue???


I turned the car off and continued to pump the clutch. On the first pump and release of the clutch the clunk happened. But only on the first release of the peddle, then no more clunk. That seemed weird so I tried to replicate and sure enough when pumping the clutch with the car off no clunk, but when the car is on there is, and one but only one release of the clutch after the car is off.


I've read posts on the switch, but wouldn't think one would be able to hear and feel a switch being activated or axle bolts if in nuetral. It doesn't seem right that it would be a differential if it happening when the car is in neutral as no torque. And linkage can't be right if that is mechanical as it should happen if car is on or off. I first noticed it in first gear most of time and a lesser clunk when shifting to second, but then changing the fluid found it when the car is running in neutral but not happening when the car is off and clutch is pumped.


Any suggestions or direction as to what to check next would be appreciated.


Thanks,

c5racr1

Sounds like the normal throw out bearing. All manual betts do it from time to time. Some more and louder then others

RM497Z06

Thanks c5racr1, I'll take a look at that, much appreciated.