THATS IT!! We need to fix the clutch issue with the G35!

[joe603]

Of course I'm talking about the "safety" feature that forces the clutch peddle to stay on the floor when you try and drop the clutch at high RPMs. I did it to me today...and for the first time, I didn't mean to do it! So I'm sitting in the intersection with my clutch on the floor, not moving.

So, what I'd like to do is get all of NICO's engineer/techs to come up with a solution to work around, or modify the car to fix this issue. It could be something as simple as the skip-shift mod for the 4th gen F-bodys. Lets fix this!!

[elwesso]

im scouring the FSM right now, but you could help me if you know if theres anything that you've heard of it being called or something like that..... some nomenclature i could search the fsm for

[elwesso]

ok heres what ive come up with....

The G uses a different MC than most other nissans do. The MC and resovior are actually seperate pieces... If you could take a picture of the MC area that might be helpful... im think it may be as simple as changing the MC to one from another nissan... because theres nothing that physically attaches to the clutch pedal... and the slave cylinder isnt any different either.... So thats waht it has to be.... it also doesnt show a picture of the resovior tank with a lot of detail... I bet theres some sort of diaphram in there that wont release the clutch with a certain amount of vacuum...

could even be as simple as unplugging a hose!!

[AZhitman]

Interesting.......

[elwesso]

Interesting.......

GREGGIE... get out there and snap a pic of the mc area.

[joe603]

I hope it uses vacuum as its primary input...but I have a feeling it uses digital data from engine speed sensors via the PCM.

[C-Kwik]

Check into the dual-mass flywheel as well. I haven't been able to find specifics, but I have seen some indication that the 2 sections are designed to allow slippage when too much torque is applied. Though, it wouldn't explain the clutch pedal not coming up all the way.

Any possibility that there may be some device where the pedal is as well?

[elwesso]

looking at the diagrams, theres not even anything that would show that would have some sort of thing to restrain the clutch pedal, thus why I think its the MC... later tonite ill get all the diagrams ican find and post em up;...

[infinititech1]

hmmm its never done this to me...but i'm gonna try it tomorrow haha...and i'll look and see if i see anything by the mc tomorrow

[RED_DET]

What RPM are we talking about lauching here. Because I know I have launched over 3-4K rpm, with no issues.

[infinititech1]

yes same here...i just tried it and that didn't happen to me...and i don't see anything around the MC...i have one parked in the bay behind me right now and i dont' see anything

[joe603]

It happens when you drop the clutch with the RPMs over 5k. In my 05, you could be stopped or going 50mph.

[C-Kwik]

I've experienced it on the 04 I had, but never saw anything on the car that would cause this to happen. In the end it smelled like I was burning a clutch up. Perhaps there is something that just causes many G's to get the clutch hung up when releasing it a certain way. I've only experienced it when launching hard. And I never launch at more than 2,000-3,000 RPM.

[joe603]

What about shifting hard while moving...if you miss a shift at high RPMs. That's what I'm worried about. Granted, this isn't a big deal most of the time, I just don't like the car telling me not to drop the clutch.

Is this feature in other luxury coupes?

[infinititech1]

i've shifted at redline a few times and never had the clutch stick

[C-Kwik]

I never had an issue in shifting. It had only occurred when launching.

[joe603]

Redline shifting is fine...its when you miss a shift. I've only missed twice since I've owned it. But the clutch sticking at a standstill is the main problem. Anybody find out if its due to a check valve via engine vacuum?

[clawthat]

The clutch will also stay to the floor and create the burning clutch smell when you are backing out and while still moving, drop it into 1st and dump the clutch. It happens easier doing that than any other way I have found. In fact, you cannot be coasting backwards and try to roast the tires...the clutch will not allow it. I hate this feature and wish there was a way to by-pass it also.

[joe603]

Thats why I started this thread...Any luck finding a solution?

[joe603]

Reviving this thread...Anybody come up with a solution?

[G_whizz]

Not to my knowledge...still a pain!!

[sixxdeuce]

Does it only do it with vdc on? Ive kicked the clutch while over 5k before and nothing crazy happens, but I have vdc off when im sliding it of course.

[Gnightrider]

Hello Gents, Mechanical diaphragm clutches have always had problems with the pedal sticking to the floor at high revs. Ask any drag racer over 40. Centrifugal force overcomes the spring pressure or something like that. Perhaps it's not as common on import car's smaller coaches? Used to happen to my Corvette powered (327/350hp) 62 Chevy II all the time when doing extreme burnouts. A company called Centerforce had a design to combat this that had weights on the clutch "fingers". I think the only cure is a pressure plate with heavier springs which puts strain on everything associated including your leg!My 05 Coupe has done also on a missed shift but I thought it was just a crappy clutch maybe sized too small and sprung too light for the power and RPM. My Coupe's clutch engages at the very top of the pedal. I'm more concerned about this at 20 k miles. It's been like that since I bought the car at 9999 miles and I saw a reference to this on a mustang forum so it isn't totrally my imagination.

[G_whizz]

Welcome to NICO!

[joe603]

UPDATE:

"EDITED BY G_WHIZZ FOR POSTING LINK IN COMPETING FORUM"

Sorry Joe..

Seems the problem is the pressure plate in the stock clutch, and the only fix is installing an aftermarket unit. Trying to find out if using DOT4 fluid will help...