I'm sure they look at it as a simple math problem: cheaper to replace CSC as they fail than redesign the part which may or may not have other issues.

At the very least, they could and probably should buy out the Zspeed or the Z1 solutions but who knows if that really fixes the problem in the long run... or creates another issue down the road.

:iagree: :shakes head:

Some 350Z models had an external slave towards the end ... I hear it worked great. Then they decided to go back to the shitty plastic internal one :ugh2: The Z1 kit was based on that 350Z external kit.

Eh? More details on that?

That's pretty much it. There's not much else to tell. The Google could probably tell you what you want to know.

My Google-Fu must be weak. I get a bunch of a threads on CSC failure and a couple aftermarket threads, and links here and a couple other boards.

Was it a particular country and/or model and/or trim or was it individual cars that had an external kit? Or a Nissan Motorsports accessory thing?

Misnomer: Yes, my car is still under warranty. I dropped it off at the dealership this morning. The service guy said he has a 350Z and haven't had any problems with his clutch. I told him that this is a known issue on the 370Zs. And that my clutch bottomed out and would not come back up on it's own; I had to flick it up with my toe. Also, it's hard to engage the gears when the clutch pedal does return on it's own. They're going to look at it and let me know what they find. Of course, I'll let you guys know what they find.

Invoice says

401 Misc Transmission

306A1-JK40D CYL ASSY - CONCENTRIC SLAVE
30205-JK40C COVER ASSY - CLUTCH, WITH DISC
306A2-JK40A TUBE - CONCENTRIC SLAVE
KN9U0-40001 GTR R35 SPECIAL BRAKE FLUID

2051 REPLACED LEAKY THROW OUT BEARING/SLAVE CYLINDER AND FEED LINE.
ALSO REPLACED CONTAMINATED CLUTCH PARTS

unless the MC is in the clutch assy, guessing he lied about replacing it.

Clutch seems fine now. No mileage, so doesn't appear they test drove.

If they didn't replace the MC, don't be surprised when it goes. When either one goes, it allows dirt into the system which can compromise the other one. So the original failing CSC could have compromised the CMC. And if they didn't replace the CMC, it could fail which in turn could compromise the CSC all over again :ugh2:

damn. a la, a cat chasing its tail... :ugh:

I may be getting to know the corp regional guy pretty well then. :\

The clutch was still wonky yesterday morning, but I held my breath and drove it the 4.5 miles to the shop. (I'm done with the local dealership. I just don't trust them. So I'm trying a nearby Meineke that's still kind of a small operation, and was nice to me the other week when my tire pressure light came on and I had no place to go to check the pressure/add air.) They were slammed, but the guy said it should be done today. He actually listened to me, then looked up the service bulletin and will try that fix first. Fingers crossed that changing the fluid works, and that everything will be ok until I can get a replacement part (which I will ASAP: I'm not going to wait for the CSC to fail again).

Sure, but they could at least make it something that they pay for whenever it happens. I don't mind a wait-and-see attitude, but making me spend hundreds of dollars to fix a known issue just because I'm out of warranty.... :mad:

Well, changing the fluid didn't work. More precisely, it worked for about 10 miles: by the time I got to my office the pedal wasn't returning properly again, and on the way back to the shop it stopped letting me change gears. Again.

The ZSpeed HD replacement CSC is on backorder. :( :(

I don't have that kind of time/money to spend on the rental car, so the shop is going to call around in the morning and see what they can find. I told them that worst case they should go ahead and put another OEM CSC in, and maybe it'll last another 20,000 miles and give me time to get the ZSpeed HD. The guy will call me tomorrow and let me know my options.

Enterprise gave me a 2016 Hyundai Elantra. I MISS MY CAR.

Have you considered the Z1 elimination kit and / or why not?

So, the service guy calls me this morning. He tells me that the Nissan tech couldn't find anything wrong with the clutch...WTF!!! Un-FN-leavable!!!! I know what my clutch was doing...I just didn't dream it up.

Anyway, I told him that maybe the clutch felt right because it was cold so have the tech check it again. Even though after a cold start, I can tell the clutch isn't right. Sometimes I believe a lot of these techs don't know how to drive a stick. This was the case with a salesman when I test drove a Z before I bought this one; he could barely get it off the lot. I'll probably have to take the tech on a test drive myself but right now I'm too busy.

Good luck bro, I hope you get taken care of.