Originally Posted by aero-head (Post 3889701)

I bought a new 2019 370Z with a manual transmission last year, and a few weeks later started noticing a loud grinding sound when changing gears around 5,000RPM. After some troubleshooting, I determined that it doesn’t matter if I’m changing gears, leaving it in a gear without touching the shifter, or even leaving it in neutral while revving the engine - the noise continues as long as the engine is above 4,500 with the clutch pedal pushed in. Interestingly, this does not happen after a cold start – the car has to be driven for 10-15 minutes before the grinding sound happens.



The symptoms seem to point to a defective throw-out bearing / concentric slave cylinder, which the dealership replaced twice but there was no improvement. They also reproduced the issue in two other new cars on the lot, suggesting that this is a design defect rather than a one-off issue. Nissan’s regional Dealership Technical Specialist indicated that a new clutch was designed for the 2018 model year (I previously owned a 2010 that never had this issue in 7+ years of daily driving), and the engineering team he’s been in contact with at headquarters has not been able to come up with a fix or even definitively identify the cause.



Has anyone else here experienced this issue? I did my best to capture the sound in the link below, but it’s much worse in person. I’m meeting with the Technical Specialist again next week and I’m going to try to get them to cover an aftermarket CSC replacement under the warranty since they can’t fix it with OEM parts, but I’m curious if anyone else has any ideas on this.



https://youtu.be/chDMb76_1c8

Originally Posted by SouthArk370Z (Post 3889720)

many others have reported the same "problem."

Originally Posted by Spooler (Post 3889710)

I don't hear a thing. That is not a CSC issue or Throw out bearing. Maybe a pilot bushing. I just don't hear a thing in the video. Our transmissions are naturally noisy.

Originally Posted by aero-head (Post 3889701)

They also reproduced the issue in two other new cars on the lot, suggesting that this is a design defect rather than a one-off issue. Nissan’s regional Dealership Technical Specialist indicated that a new clutch was designed for the 2018 model year (I previously owned a 2010 that never had this issue in 7+ years of daily driving), and the engineering team he’s been in contact with at headquarters has not been able to come up with a fix or even definitively identify the cause.

Originally Posted by nis350 (Post 3891462)

I think Nissan just used a different clutch for the newer model. The transmission and the clutch hydraulic (cmc & csc) haven't changed.

you can always replace it with the older version of the clutch and that noise should be eliminated.

Originally Posted by aero-head (Post 3893384)

That's interesting. I was under the impression that the CSC was new as well, but it looks like you're right - the Nissan parts site lists the same master and slave cylinder part numbers for model years 2009-2020. Same goes for the pilot bushing (which they also replaced during both of the repair attempts) and the flywheel (which they replaced the last time). The pressure plate and friction disc are the only parts I can find in that area that have different part numbers starting in 2018.

As far as installing the older OEM clutch, Nissan previously told me it's not compatible with the newer car. No idea why that would be, but I can ask again. Otherwise I'll see if I can get them to pay for an aftermarket clutch rather than just replacing the CSC again...