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2009+ 370Z General discussion and news for the Z34 (2009+) Nissan 370z with the new 3.7-liter V6

370Z Clutch vs. 350Z Clutch

Old 08-28-2010, 10:18 AM
  #41  
em1sleeper
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Originally Posted by badbee View Post
I recently sold my 2008 Touring 6 speed, and the rattle sound that plagues the 08's is very noticeable when you are in neutral with the clutch pedal out. Push in the clutch and the rattle sound goes away. Actually, your RPM's will drop slightly when your let the clutch out probably to keep the flywheel spinning and give us that wonderful rattle noise. The dealer advised this is normal so I tried two other 6 speed 08's and they all did it. Even thought they all do it, I don't think it speaks well for the longevity and quality of the clutch. Also, shifting from first to second was always notchy and not smooth like the other gears.

.
I own a 2000 Civic si, the stock clutch felt decent but it was always easy to shift and simple for any enthusiast, then I upgraded to a ACT stage 2 clutch which is perfection . I work at a nissan dealership and I drive any car at any time I want, so each lunch break or chance I get, I take the 370z out for a drive. I've driven it every other day since the beginning of the summer and I drive several different Z's in our lot consistantly. I've driven several manual transmission cars for over 5 years and this 370z was VERY dissappointing. The car's handling, power, and overall control is amazing, but the transmission is such crap!

I spoke to my friends in the mechanics shop at my dealership and they explained that the 370z has different synchros in the first and second gears and that they are designed completely differently compared to the rest of the synchros in the next 4 gears. He wasn't sure why nissan has this but we all agreed that the shifting into first and second is significantly rougher and feels different (in a bad way) and we all experience this strange rattle/chatter during our own test drives.
Everytime I drive a 370z to lunch or where-ever, I notice a rattle or chatter (very noisy) and it feels like the transmission is going to explode
The clutch is way to soft, but possibly (hopefully) an aftermarket clutch would significantly improve the clutch stiffness..??
Overall, this transmission chatter has destroyed my chances of buying this vehicle, so now I'm saving up for a auto g35 instead, but what's this I hear about 09+ g37 autotransmission issues?? O man..
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Old 08-28-2010, 11:05 AM
  #42  
davidv
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Since all these characteristics are qualitative, I say that the 370Z clutch is about the came as the 350Z clutch. Do not see an appreciable difference.
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Old 08-29-2010, 08:35 AM
  #43  
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Originally Posted by Goin' Sidewayz! View Post
The clutch problem that you are thinking of only occured on a percentage of the 2007 Zs. It was recalled for the 07 models that were affected and the problem was fixed for the 2008 year models.
Originally Posted by Salvatorey View Post
the clutch problem was fixed mid 2007 by replacing the clutch slave cylinder. We won't see that problem again for 2009.
Meh, still happened in my 08, four times after taking it to the dealer for multiple repairs, lemon lawed that piece
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Old 08-29-2010, 09:27 PM
  #44  
echotech
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i test drove a 370 first before i bought my 08 touring. From what i remember, i thought the 370 clutch had a shorter travel and engagement compared to the 350's clutch. Similar to my s13 which i had a few years back.

clutch weight between the 370 and 350 are pretty much the same. don't know about the previous years but it seems pretty effortless to clutch in clutch out in the 350.

only thing i didn't like about the 370z was the very tight shift gates. i found myself constantly misshifting from 2nd to 5th.
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Old 08-30-2010, 01:25 AM
  #45  
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I have driven several 370z's w/ manuals and compared to my 04 even they they are baby soft in feel I preferred driving them once I got used to the difference. I hate all the noise my clutch makes and the fact that if I try to shift fast especially two second it grinds if I am up near red line which is very very annoying !
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Old 08-30-2010, 07:39 AM
  #46  
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The 07-08 Z and 09+ 370Z feel the same to me, until you load the clutch on the HR. In most cases it will drop to the floor, during a hard launch.

Didn't notice that issue when driving the 370Z.
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Old 09-01-2010, 06:23 PM
  #47  
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Interesting..
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Old 09-02-2010, 11:27 AM
  #48  
DaveSB
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I can tell you several things about the 370z clutch and flywheel...
First, they all use a dual mass flywheel for 'ease of driving'. The 2003-2004 350z clutch eas a non self adjusting pressure plate from the factory, in early 2005, they went to a 250mm self adjusting LUK pressure plate. This created a softer pedal. The HR came out and they went with a 240mm LUK self adjusting pressure plate and kept the same part number kit in the 370z. For comparison, I used a machine to simulate the pressure plate of all of these as if they were being bolted down. I measured the 'bearing load' aka the weight it takes to disengage the clutch. My results were:

03-04 DE 450lbs of bearing load
HR & 370z 325lbs of bearing load

I didn't have a sample of the early 05 PP to measure, I threw mine out when I pulled it from my own car

So you can see why the older cars had stiffer pedals. This also leads into why the CSC is not holding up in these cars very well. Lets say you add a big twin or tripple disk clutch with a heavy diaphragm spring. Then the bearing load goes up another 100-200lbs. The little dinky CSC can't hold the extra pressure when it's nearly doubled.
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Old 09-15-2010, 02:37 PM
  #49  
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I came from an 05 350, and the clutch felt slightly softer but the engage point was the same. And the shifter felt a little taller so the throws were slightly longer. The difference was subtle, a few days and you'll forget all about it.
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Old 07-13-2013, 12:25 PM
  #50  
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Default Can to make the clutch in the 370z as stiff as the clutch in a 03 350z?

I have a 2003 350z. I had had this car for almost 4 years, and I'm thinking about selling it for a 2010-2012 370z. I've been researching on the clutch difference between these two cars. I really like the stiffness of the clutch in my 03 350z. I want to know if you can make the clutch in the 370z as stiff as the clutch in a 2003 350z? If someone can help me that would be great...
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Old 07-13-2013, 04:10 PM
  #51  
DavesZ#3
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The 370Z clutch is like that done on the later years of the 350Z, they changed to the concentric slave cylinder. I doubt you could "downgrade" either the newer 350 clutch setup or the 370z setup. You'll get used to the new one after a while
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Old 07-14-2013, 11:41 AM
  #52  
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Originally Posted by element5003 View Post
I have a 2003 350z. I had had this car for almost 4 years, and I'm thinking about selling it for a 2010-2012 370z. I've been researching on the clutch difference between these two cars. I really like the stiffness of the clutch in my 03 350z. I want to know if you can make the clutch in the 370z as stiff as the clutch in a 2003 350z? If someone can help me that would be great...
Yes it can be done, although some owners seem to run into problems doing so. The stock CSC doesn't seem to hold up well with aftermarket clutches, replacing with a new factory unit or upgraded one is a good idea while you have the transmission out.

Another issue I've noticed is that once the clutch & CSC are replaced (especially with an upgraded CSC), the master cylinder fails. I had a Clutchmasters stage1 clutch and aftermarket CSC installed at 45k miles and immediately had to have the master cylinder replaced too.

With that done, it now feels like a proper sports car. Good pedal feel, grabs hard when needed, very good for daily driving and engagement is not so on/off like the factory clutch.

That was back in September w/ 45k miles. Currently at 60k miles now and couldn't be happier with the setup. I hope this helps.
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Old 07-14-2013, 12:52 PM
  #53  
midz350
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Originally Posted by DavesZ#3 View Post
The 370Z clutch is like that done on the later years of the 350Z, they changed to the concentric slave cylinder. I doubt you could "downgrade" either the newer 350 clutch setup or the 370z setup. You'll get used to the new one after a while

I have done it and posted a thread about it 3-4 years ago.

Last edited by midz350; 07-14-2013 at 12:53 PM.
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Old 07-14-2013, 01:00 PM
  #54  
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Here it is: https://my350z.com/forum/vq35hr/4495...r-problem.html

Its not organized, but got all the info you will need.
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Old 04-30-2015, 06:56 AM
  #55  
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Originally Posted by DaveSB View Post
I can tell you several things about the 370z clutch and flywheel...
First, they all use a dual mass flywheel for 'ease of driving'. The 2003-2004 350z clutch eas a non self adjusting pressure plate from the factory, in early 2005, they went to a 250mm self adjusting LUK pressure plate. This created a softer pedal. The HR came out and they went with a 240mm LUK self adjusting pressure plate and kept the same part number kit in the 370z. For comparison, I used a machine to simulate the pressure plate of all of these as if they were being bolted down. I measured the 'bearing load' aka the weight it takes to disengage the clutch. My results were:

03-04 DE 450lbs of bearing load
HR & 370z 325lbs of bearing load

I didn't have a sample of the early 05 PP to measure, I threw mine out when I pulled it from my own car

So you can see why the older cars had stiffer pedals. This also leads into why the CSC is not holding up in these cars very well. Lets say you add a big twin or tripple disk clutch with a heavy diaphragm spring. Then the bearing load goes up another 100-200lbs. The little dinky CSC can't hold the extra pressure when it's nearly doubled.
THIS. Z speed makes a CSC upgrade made of metal instead of plastic.
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Old 01-13-2016, 04:40 PM
  #56  
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I owned a 2004 350 and traded it in for a 2010 370z sport touring. 370Z Clutch action feels about the same as the 350.

Only time a had an issue with the 350 was during auto-crossing and I have the same issue with the 370. I tend to miss a shift or two when competing.

Not sure, but I think this is more the fault of the driver than the clutch
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