I was under the impression that if it were truly a synchro issue, you would find that the condition would not improve slightly like it did. I vote something to do with the clutch, flywheel or slave.

That is the odd thing that the condition got better. I checked the clutch fluid and it does smell slightly burnt. Been raining all day today so I can't do nothing. I'm going to at least bleed the clutch but I really feel that's not the problem. Reguardless it's going to the dealer this week. Every gear feels rough and requires a little force to place in gear. When the car is not running and you shift I here all sort of noises. Like a bunch of linkage problems. Not sure. Plus when not running it slides into gear without the clutch pressed in. It seems to go in gear easier without the clutch in. 1,2,5, and 6 seem to be the worse. Transmissions are my weak point so I don't know. It will all be fine though. Not to worried about.

My honest opinion is that if it is still not operating correctly then it is deffinatly not from the fluid. I would venture to say the CSC has a small crack and unable to hold pressure. If you overheat or glaze the clutch, your clutch pedal will have no pressure for a few seconds but will come back and you will have a nasty smell. Another would be the clutch itself is just worn out, the organic material is only so durable. Not having the SRM, you may have over worked it which isnt your fault like I said its not that durable and wears down and burns up faster then a metalic on top of the stock clutch being a single plate clutch. I would honestly say that if Nissan says anything about the CSC or clutch then upgrade both.

replace the clutch its getting weaker and is about to be gone completly. Drive it very nicely and just do the clutch/flywheel/CSC in one shot if you got the money or dont mind saving up a little.

nice user title :tup:

He didnt overwork it. He has a total of three days on track, and I instructed him on the first one. His heel toe skills are well above average for his experience level. I had no clutch issues until 17000 miles, about 8000 of those on track. Mine turned out to be the csc, but replaced the cl itch and flywheel to anyways.

To replace the CSC, you need to remove the bellhousing

Mike did you replace your CSC to an upgraded one or did Nissan replace it?

I boiled my oem clutch fluid on my 1st track day last month (pedal sticks to floor and eventually becomes unuseable, pedal travel is really reduced prior to this tho) so it doesnt sound like you have that issue. I immediately ordered some motul 600 and ran with that in there this last weekend. No issues whatsoever now on that front. The CSC issue sounds likely. Looks like we both developed issues over the weekend. Im getting grinding noises that i can also feel though the seat under hard cornering now...:ugh2:
Good luck man, keep us posted.

Edit: not to hijack you thread at all but if anyone has any ideas about mine id appreciate any input you have. To describe it more fully: Like I said, its a grinding feeling that i can also hear, about 10 minutes of lapping and it will go away until the next session. It initially only happened under extremely loaded cornering when i got on the power but developed to the point i could feel it for several seconds dollowing the corner after i had straighted out. I felt it on the freeway yesterday when i accellerated and hit a bump/depression in the road. Sounds/feels like metal on metal grinding, not screeching tho. Doesnt occur when both drive wheels spin from acceleration in a straight line or though a turn. I smacked my left rear tire into a curb pretty good a little while back and had to replace some of the suspension pieces on that corner. Thinking its possible that these are related, the sound does seem to be coming from that area but its hard to tell.

I don't know. Jon @z1 did it for me. I got an aftemarket flywheel, used like new clutch and I'm not sure about the csc. I didn't get a copy of the work order since we swapped for some powdercoat work

Ok. Jon is post to call me back today.

Yea I didn't have that issue. I did have Motul in with the added Z1 SS line. But either way the line is still close to my test pipes. Even though it's has a heat wrap on it I wonder if it needs note protection. Maybe wrapping my test pipes.to me it seems that reguardless of the high temp fluid that if it gets so hot it could still ruin the CSC. For our CSC are not the greatest. Now I'm hearing the aftermarket ones have fell also.

So tha being said I wonder if both our CSC's are half way from going out? We have abused them from the track. I just got done talking to Z1 about this and I think I'm just going to drop the tranny replace the CSC, clutch, flywheel and see where that leaves me. Don't really care to go to the dealer it it's nothing major. If this doesn't solve it then it will be on Nissan. I should have a better clutch reguardless. Thinking of getting a six puck clutch. I could do all the work myself but I'd rather see Z1 do it once then I know I can handle from there on.

Hmm, my issue seems to be in the rear / left rear rather than the clutch / tranny. Think I was kinda unclear. I was looking at that JWT clutch/flywheel combo tho, the price is definitely right. Based on stuff Travis has said in his posts it might be in my Z's future.

Yea I'm trying to see what the other track guys use before I make make up my mind.

Hmm, looked more extensively under the car today. Looks like the oil from the diff is leaking out around the driveshaft seal. Im going to assume this is because I overheated the oem seals. There is some oil sprayed on the metal parts/heatshield around the UV joint where the shaft meets the diff. Thats not cool. I hope that this is the actual issue tho, doesn't look like a whole lot. Ive got an appointment at the dealership tomorrow, we shall see. If my diff is fried I might just have to get a real one.

I got the ACT flywheel. I the video I linked, the 350z is running a JWT flywheel at about 14pounds, a little more then the clutchmaster. Below is some information and part of a conversation I had with Joe at Zspeedperformance about flywheel chatter if that is something your considering in your search:


"The TZR makes a little bit of noise down low in the RPM range due to the rigid disk regardless of the flywheel you put with it. A lighter flywheel will make even more noise/rattling of the trans gears.
If the noise is not an issue by all means go with the performance, no reason not to.


I have the DXD 28lbs, ACT steel streetlite 18lbs, Fidanza aluminum 15lbs, Clutch masters aluminum 13lbs, Competition steel 17.5 lbs flywheels in stock"
(Joe Allison Zspeed)




"Here is a link to the trans noise associated with the LW flywheels."
(Joe Allison Zspeed)


Flywheel Chatter - YouTube