I thought this would not happen to me but I'm finally making a post about problems with my G. I tried to baby it and everything but it still came to this. It's the transmission. Recently when I turn it off, I hear a sort of grinding before the engine completely shuts off.

I'm going to bring it to the dealer, but I'd like to get a heads up on what the problem could be first. I still don't trust the dealerships.

Thanks guys.

Black / Black 2004 GcoupeMT. Premium. Splash Guardz.

 

I have the same problem.

I have it happening when I start up the car from a cold start and when I go to shutoff the car.

I brought it to the dealer they and they tell me that they can not recreate the problem and have yet to see a TSB

 

I know what the exhaust sounds like when I turn it off. I hear this noise directly under the car where I know the transmission is...

Black / Black 2004 GcoupeMT. Premium. Splash Guardz.

 

i've posted about this b4 with no replies...the noise i have is more of a rattling noise, which is most likely attributed to the throwout bearing noise that a couple of people have been hearing when their car is idling in neutral w/o the clutch depressed. when u shut the car off, i figure that the bearing is winding down, hence the rattle (kinda like a grind, but more like a big rattle)...do u have that noise at idle? the noise seems to come and go as it pleases, and so is the noise at idle, so i figure they are one and the same. i've brought this issue up with infiniti, and they said they cannot re-create the problem. so i guess maybe i'll keep bringing it to them until i hit the lucky (or should i say unlucky) time that it will rattle for me. good luck.

04 DG/G/6MT/Premium/Nav/Clear Bra
Bone Stock...to be continued...
"You kill mah brodah, now I kill you!" - some old kung-fu flick

 

I've got videos of the knocking at shutdown as well as the cement mixer at idle (trying to find a place to upload them now). I'm going to press the issues at my next oil change. I'm on my second clutch and transmission now. I've yet to have a consistent smooth shift to second gear (mini-grinds) in this car in 6500 miles. The G35 6MT (in my car at least) blows big, huge, massive chunks.

 

Oh got the vids uploaded:

Mixer is me pressing in and letting out the clutch.

Clatter is me cutting off the car in neutral clutch out. This is actually a quiet shut down relative to normal (more rattles usually). If I shut the car down w/the clutch in I get no clatter.

 

I get it too and have heard it since I got the car. Probably nothing to worry about.

 

It's the throwout bearing ...

Black / Black 2004 GcoupeMT. Premium. Splash Guardz.

 

will the dealer reaplace it for free? I get it sometime as well.

04 G35C 6mt/aero kit/nav/premium

 

I thought it was a normal thing for manual cars. My car does it, my brothers CL-S does it and my friends tsx does it too. I

 

IT IS NORMAL.

Twilight Blue G35 Coupe 6MT
Premium - Nav - Aero - Trunk Mat
Injen CAI

 

That's funny because I also own a TSX and it doesn't make any of these noises. Neither did my (all manuals): Escort Hatchback, Cavalier Z24, BMW M3, supercharged Miata pushing 2X stock power through the stock driveline, Corvette, S2000, Celica GTS, or BMW M5.

I believe this is a prevalent sound, but that doesn't make me think that it is "normal" or that I should be hearing it in my car (it doesn't help that my 6MT shift quality has been less than stellar as far as me thinking everything is a-ok).

As for the Corvette sound that people here mention as being the same sound and it's ok, it's not. The C5 (the one w/the owners video that explains things like the vette rattle) has a transmission that is separated from the engine (the xmision is over the rear wheels for better weight distribution). It has a shaft turning at engine speed running under the car to the transmission. That setup does make some quirky sounds, but the G35 is so far from that set up I just don't see any parallels. And by the way, I never really notice the rattle in my vette vert...

 

in my experience, IT IS NORMAL, but only when the main throwout bearing is on its way out and needs to be replaced.

04 DG/G/6MT/Premium/Nav/Clear Bra
Bone Stock...to be continued...
"You kill mah brodah, now I kill you!" - some old kung-fu flick