Grind shifting gears after New Clutch - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

helladrifters · 08-26-2010, 04:51 PM

So recently I pulled a Spec clutch out of my car (from previous owner) because it was slipping bad. The car shifted normally, it just would slip super easy in higher gears.

Anyway, I bought one of the ebay Exedy OE style clutches for the car. I took out the flywheel and had it resurfaced (lightweight, not sure the brand) and installed both back in the car. Everything went smooth on the install.

One thing I noticed though is that the Exedy clutch/pressure plate was slightly shorter than the Spec clutch and plate when stacked side by side.

Right now I'm having the issue that if I try to shift quickly (pedal fully depressed even), It grinds going into gear, 2nd gear especially bad. It does this sometimes if I'm in first gear and I put my foot on the clutch and don't even shift or put it into neutral or anything.

I adjusted the clutch pedal because I thought that would help, but its backed all the way out and nothing has changed. I bled the system as well, but that didn't help at all.

Any ideas what is going on here? kind of frustrating

Thanks

shiftdrift · 08-26-2010, 04:59 PM

synchros bad? what gear oil did you run? gl4 i hope.

helladrifters · 08-26-2010, 05:01 PM

Well something I forgot to add - If i shift slowly there is no problem. I can drive around town find granny shifting or whatever its called.

As for gear oil, 75-90w maybe? I can't remember. It was the factory suggested weight, something synthetic

heavenboundkevin · 08-26-2010, 05:12 PM

75-90 can be either gl4 or gl5, the reason he asks, is becasue gl5 is bad for your transmission, something about it eats the coating on the synchros-dont quote me cause im not 100% sure.

helladrifters · 08-27-2010, 12:31 AM

huh well I hope not. I have no idea though which one it is. I just bought whatever was recommended.

The transmission was shifting fine before the clutch replacement, I hope its not internal

helladrifters · 08-27-2010, 04:49 PM

O also, I never grinds during downshifting, only upshifting

forgot to mention that

240Shwag · 08-27-2010, 06:14 PM

Quote:

Originally Posted by heavenboundkevin

75-90 can be either gl4 or gl5, the reason he asks, is becasue gl5 is bad for your transmission, something about it eats the coating on the synchros-dont quote me cause im not 100% sure.

GL5 oils contain a additive for high pressure (sulfur), sulfur happens to eat away at brass (synchronizers).

08-26-2010, 04:51 PM	#1
helladrifters Leaky Injector Join Date: May 2010 Location: Boulder, CO Age: 31 Posts: 109 Trader Rating: (0) Feedback Score: 0 reviews	Grind shifting gears after New Clutch So recently I pulled a Spec clutch out of my car (from previous owner) because it was slipping bad. The car shifted normally, it just would slip super easy in higher gears. Anyway, I bought one of the ebay Exedy OE style clutches for the car. I took out the flywheel and had it resurfaced (lightweight, not sure the brand) and installed both back in the car. Everything went smooth on the install. One thing I noticed though is that the Exedy clutch/pressure plate was slightly shorter than the Spec clutch and plate when stacked side by side. Right now I'm having the issue that if I try to shift quickly (pedal fully depressed even), It grinds going into gear, 2nd gear especially bad. It does this sometimes if I'm in first gear and I put my foot on the clutch and don't even shift or put it into neutral or anything. I adjusted the clutch pedal because I thought that would help, but its backed all the way out and nothing has changed. I bled the system as well, but that didn't help at all. Any ideas what is going on here? kind of frustrating Thanks

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08-26-2010, 04:59 PM	#2
shiftdrift Nissanaholic! Join Date: Nov 2009 Location: indiana Age: 31 Posts: 2,242 Trader Rating: (42) Feedback Score: 42 reviews	synchros bad? what gear oil did you run? gl4 i hope.

08-26-2010, 05:01 PM	#3
helladrifters Leaky Injector Join Date: May 2010 Location: Boulder, CO Age: 31 Posts: 109 Trader Rating: (0) Feedback Score: 0 reviews	Well something I forgot to add - If i shift slowly there is no problem. I can drive around town find granny shifting or whatever its called. As for gear oil, 75-90w maybe? I can't remember. It was the factory suggested weight, something synthetic

08-27-2010, 12:31 AM	#5
helladrifters Leaky Injector Join Date: May 2010 Location: Boulder, CO Age: 31 Posts: 109 Trader Rating: (0) Feedback Score: 0 reviews	huh well I hope not. I have no idea though which one it is. I just bought whatever was recommended. The transmission was shifting fine before the clutch replacement, I hope its not internal

08-27-2010, 04:49 PM	#6
helladrifters Leaky Injector Join Date: May 2010 Location: Boulder, CO Age: 31 Posts: 109 Trader Rating: (0) Feedback Score: 0 reviews	O also, I never grinds during downshifting, only upshifting forgot to mention that