Small update for you guys:

The car is in the shop right now. Pure Automotive Performance in MD. Fun fact the owner is whipping around a lime green C8 lol. Can't speak for their work just yet, but I have some co workers who take their cars there and vouch for their service. I can, however, vouch for their customer relationship. I asked the owner to call me when they dropped the tranny and he was happy to answer all my questions.
He said the underneath of my car looked brand new and that he's seen some Zs that look like they've been living under the sea lol. He also mentioned he isn't a fan of the Zs OEM clutch and flywheel assembly (due to being a multi-component part) and the one from zspeed, along with the CMAK, are great upgrades. He didn't notice any unusual wear of the CSC or clutch itself which I thought was interesting. He did, however, say my clutch fluid was dirty AF and somewhat watery, but was not leaking - again, interesting. He said once everything is installed he will bleed everything out, use DOT 4 fluid for the clutch/brake, and top off the rest of the fluids. Seems promising for far.

Man, can't believe it's June 1st already...

Reasonable charge for service? PM me

Finally got my car back and it's a night and day difference...I would have never imagined. My face hurts from smiling. I even took off early from work just to drive around.
First, the shop was great to me. IDK what else I can say about that. They were just a pleasure to work with and only time will tell about their workmanship. The amount I paid for the service was close to the quoted amount, so I was cool with that.
Second, the car just drives a million times better. I had no clue what I was missing out on. The car no longer judders when taking off in first gear. The weird stock engagement point of the clutch is gone. The clutch pedal is much more stiff now, so that's subjective, but I personally like it. The engagement point is very short and close to the floor. It's just soooo smooth and makes driving it easier. BEYOND happy with this mod.
Lastly, the top speed axle back exhaust is a major go. I've come to understand people either love it or hate it on this forum and it is often referred to as the "eBay" exhaust because there are clones that go by J2, Manzo, and Beluga. Whether it's a clone or not, this exhaust has made my car sound EXACTLY how I wanted it to and I absolutely love it. Gives it the perfect rumble and it gives off the perfect VQ noise that you can hear 5 miles away when you're WOT. The shop ensured the tips were centered and I've had no issue with drone so far. My wife even liked it lol Definitely worth the $300 IMO and I'm sure you can find them for ~$200 depending on the brand or if it's used. I'd only suggest it if you're going the axle back route, otherwise you probably want to upgrade the entire exhaust system with something else.

Thank you all again for pointing me in the right direction. Super stoked. If you have any questions please feel free to ask me.

I think I have experienced CSC failure. I live in Boston but am currently doing a road trip to Florida. Yesterday was most exciting part of my trip, I spent the day in TN and did a few runs on The Tail of The Dragon. I don't have oil cooler so I had to stop a lot to let car cool down. In one of these stops, when I got back in the Z the clutch was soft and was halfway to the ground. I drove it normally and in about 10 minutes it went back to normal. I checked clutch fluid and levels are okay. I have driven the car another 25 miles after that and the issue has not returned. I still need to make it to Tampa FL and make it back to Boston after. Do you all think I will be able to make or should I go ahead and get CSCEK?

You may have boiled the fluid in the system. Wrap the clutch line by the exhaust with insulation. Flush the system with Motul 600 brake liquid. If you are going to replace the CSC. Get ZSpeed CMAK.

https://zspeed.com/product/zspeed-pe...-g37-g35s-q60/

Once it sinks, it just a matter of time. If you want to wait until the inevitable happens and don't mind the hassle of getting it towed or driven with a bungie chord on the pedal, that's fine. I wouldn't wait and would rather start on deciding on what to get from ZSpeed like Rusty said. I think I went through my OEM and 2 replacements before the CMAK.

How much do shops usually charge for a work like this

Well I think this failure has bit me tonight. Was heading home after dinner and got on it and lost pressure with the clutch. Was able to coast into a parking lot, but the pressure got worse and worse until I couldn’t get it in gear anymore.

I guess I’ll get it towed to the stealership and see what they say.

So the stealership is saying my pressure plate is likely gone as there is no leaking fluid, and after sitting for several days they were able to move the car and out in gear.

They quoted me $2,900 for OEM so I’m looking at going with the Zspeed stage 2 with CMAK csc delete. This would also upgrade my csc and I’m going to replace the cmc while I’m at it. Only thing is I’m not sure about going to a solid flywheel vs dual.

You will get a little added noise with the solid but it will drive much much better than the dual mass as well as add a good amount of performance.

Thanks Joe! You’ll see my order tomorrow or as soon as those sales start for Black Friday!

Shout out to Joe@Zspeed as I ordered my parts this Thursday and he shipped on Friday. I just got them in today, yes a Sunday, and will deliver to dealership tomorrow. Hope to have my car back Tuesday or Wednesday.

Thanks Joe, you got yourself a future customer in me for sure!

You have it all installed now that it's Monday, right? :driving:

HaHa, I wish!

Dropped it off at the dealership this morning. They're getting to it either tomorrow or Wednesday. I don't have the tools and lift to get this done.

Just got my car back! WHAT A DIFFERENCE.

I can tell now how much my old clutch was slipping.

I also had times where my rev match would shoot up when I engaged the clutch but didn't change gears yet. Reading the other night it sounds like that's another sign of the clutch slipping.

I'm taking it easy for the first 500 miles or so, but it's night and day so far.

The technician at the dealership was also VERY impressed with ZSpeed's kit and CMAK.

Anyone know if the CSC issue was fixed on later model 370's? Haven't been able to find a solid answer yet. I've got a 2019.

Nope. Still using the same old parts.

Terrific.

Zspeed to the rescue
 

ZSpeed replacement CSC. Buy one. When the inevitable happens, you can have this one installed instead of the faulty OEM unit. It's an all metal unit and now they sell a kit that includes a new master cylinder. When the CSC fails, it contaminates the fluid which can compromise the master so it's always recommended to change both at the same time. I've had this on my car for 6 years and never had any problems. Clutche is rock solid, 100% predictable, and my fluid has never gotten dirty or contaminated since. The Nissan tech that installed it said that he's never felt a clutch feel so good in one of these cars before. Lol

CSC only: https://zspeed.com/product/zspeed-he...lave-cylinder/

Master and CSC kit: https://zspeed.com/product/zspeed-hd...less-hose-kit/

CSC failed at 15,000 miles
 

You can add me to the victims list. I have a 2015 with 15k on the odometer.

Pretty much the exact same story as everyone else. Luckily, I researched prior to having the dealership do anything (thanks to this forum of course). Long story short, I had Nissan replace the fluid, and bleed the line, which obviously didn’t work. They wanted like $2,500 to replace the usual suspects, and he probably added a bunch of things to inflate the bill. I don’t remember, because I wasn’t even listening at that point. I had no intentions of having them do the work, even if the CSC they were replacing it with was a good part, and not made of plastic.

I went through the Nissan complaints/claims process, to no avail. Has anyone ever won one of those battles, and gotten their bill covered for csc/cmc failure, out of warranty? It looks like no, but figured it’s worth asking. I ended up getting the JWT CSC, and OEM master replaced by a 370z mechanic who knew the problem well. It was 1,170 total ($420 for parts $750 for labor). The car is running great. It feels like I’m learning how to drive stick again, because of how soft the clutch became before failing. I had forgotten how high the engagement point was. Is there any harm to removing the assist spring, that I keep reading about?

Basically Nissan is handing everyone who purchases the Z, a bill for 1-2k, before even driving it home. What makes me sick, is they still use the exact same part to this day. I’m a soured with Nissan for good. I would think it would be less expensive to fix the problem and make whole the people who were screwed, than to lose so many loyal Z enthusiasts. When the next Z comes out, we are all going to be thinking, “Okay, what sh!tty part is going to go bad in this car.” And we will 100% know that Nissan will do whatever is in their power to screw you, instead of help. It’s saddening to me.

Short of reading through this entire thread to try to find the answer (as I’m very flustered at the moment.)

For anyone that has had theirs fail, did anyone notice a pop right before it failed?
I’ve got a RJM clutch arm and I can’t tell if something broke.
I can start the car, but it won’t go into gear. I also noticed when it’s it the fully up position, the arm isn’t touching the upper switch.

I’m sitting here waiting for a tow, in the rain and just trying to get some idea if anyone else has had this same issue?

Edit: Figured it out. I sheared off one of the bolts to the master cylinder.
http://www.the370z.com/members/trees...7-img-4147.jpg

Contact Ryan at RJM directly. If the problem resides in the the pedal assembly, he should be able to help.

My Zspeed HD CSC just failed after just changing it last year. Probably gonna bite the bullet and get the CMAK this time.

That's unusual. Are you sure it isn't just the master cylinder?

Hopefully. I haven't looked into it yet. Just the pedal to the floor symptom.

Edit: Great news! It was just the clutch hose ripped off at the crimp. I would've upgraded to stainless but wanted it back on the road asap so maybe another time.

Honestly I don't think the problem is as widespread as these forums would lead you to believe. My 09 has 115k on the odo and I think it's just now failing. Or maybe it's the fact the clutch fluid has never been replaced...ever.. This morning when I went out to go to work the clutch pedal kinda had some slack in it, didn't stick but yeah... Either way I'm replacing the clutch, flywheel, slave and master in August. This car has been rock solid to me even with me neglecting certain things, like the clutch fluid.

Question for you guys
 

I'm having a bit of a weird issue with my clutch system. I replaced the CMC and CSC about 1.5 years ago.

OEM CMC and and a JWT Heavy Duty CSC.

Today, I notice a softer feel than normal and eventually it got so bad I had to pump the clutch pedal and it would build enough pressure to shift.

I had the dealer do a fluid change and it felt great......for about 30mins. Then back to little to no pressure.

At this point, I believe its the CMC and I don't see any leakage under the car or anywhere on the lines, but I just wanted to see if you guys had any thoughts.

Thanks!

My 2015 failed once at under 5000 miles. My 2016 failed twice before 20k and the third time about 40k. Nissan covered the first two under warranty but not the third (did get a case with corporate but bupkis) so I did a Zspeed CMAK. I killed my clutch trying to limp home but still ended up getting towed so replaced that with an OS Giken. Nissan put GTR fluid after the 1st failure and again after 2nd. Mechanic said the master cylinder looked fine but had him replace that, too since Nissan did both times (they replaced the flywheel at least once (the second time) citing contamination but that was covered).

Ordered an RJM since not really happy with the engagement on the new clutch/slave combo.

I DD so don't really drive her too hard. Never launch with no traction or anything. No racing or autox. Will occasionally redline 1-3rd but nothing crazy. Always thought the stock clutch felt a bit weird compared to every other MT I've had, though.