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Do your problems happen while Sync Rev is on or off, or both?
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While I dont agree that our transmissions are horse $hit, they are definitely not very refined. On top of the problems mentioned above I find it rattles and chatters all the time. |
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My car rarely lurches anymore since I changed my clutch and things have become way way more livable. I know what you're saying about the shifting too fast too...its like it doesnt want to let you get into gear until the engine speed has been reduced a bit. You can muscle it in there, but it feels like you're forcing something... We all have the same stupid problem and I have a feeling the whining we are hearing might be a side effect of the shifting issues. Maybe the great SRM system isn't so great after all and is actually causing issues in the long run...I'm going to swing by the dealer and ask a tech about it. God forbid someone who works on these cars all day everyday might know something about the issue... I too am very very tired of this transmission, it literally ruined the car for me. |
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shifter re-alignment - MY350Z.COM Forums I don't think I'm that handy with tools to do this job, so I may have my dealer do it for me on the next oil change. Quote:
What makes a clutch judder |
Raul, about a week ago I had a 100% stock 370 in the shop, It had 1st gr "lurch" , but only if depress the clutch and immediately throw it into 1st gr. If you wait a second longer it won't lurch at all. I totally agree the trans in our car is a moody bitch, but some how the one in my car is perfect, no "lurch" or grinds and you know I beat the hell out of it ...steady power shifting!
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also...fwiw, I mic'ed you dxd clutch disc and the clutchmasters and the clutchmasters was .5 mm thinner.
Also I spoke with Joe , who makes the metal csc and said has a different csc that a little bit more throw which might help everybody else as the problem feels like the clutch is slightly dragging for a split second making it "lurch" the car forward. |
Sadly if my transmission comes apart again, its to get put back to stock. I'm not putting another cent into it. If Joe wants to let me test and you want to help with labor then I'll do it for the sake of helping the rest of the folks on the site out, otherwise people can wait until the next person that needs to switch clutch or wants to try and fix the issue.
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After the first week, I stopped using the S-mode. After about a month, I stopped using VDC unless I was in a downpour or snowy/icy driving surface. Those items are good ideas, but very intrusive and downright unrefined. Wonder if someone will offer tuning solutions for those systems as well. If not, I will simply leave S-mode off (most of the time) and see if I can have VDC off by default.
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vdc off is easy disconnect the yaw sensor or put a momentary interrupt button in it's power wire that will totally kill both phases of the vdc. i'm used to the clutch lurch from my kawi's multiplate but my z shows no sign of lurch, although shifting is a pain sometimes. the synchro's are garbage maybe os giken could just come out with replacements for those bitches.
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BTW, I don't want to permanantly disable VDC. I just want to be able to start the car and have it off by default, but turn it on if I let someone else drive or there is/are water, snow, ice, or marbles on the road........... |
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If you really want it there is a device available that basically presses the button for you on start up and you can still toggle it back and forth. Search the forums and you should find it. |
I think KP technologies makes a module for the vdc switch.
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FWIW, I have another stock 370 in the shop today... it "lurches" forward also...
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Yup... count me in. It can't be the shift gates. After a week of driving I wondered why the gearbox required more effort than usual to the point it was difficult getting out of gear from park and even shifting in all of the gears. I did the "lurch" test and confirmed it, but it's very minor.
When the car was in the shop with the new clutch and ZSpeed CSC, the master cylinder failed, too! Also, the juddering issue is getting better. Guess it is still breaking in. Quote:
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Ok about this issue, in my car the only thing stock Is the clutch/flywheel, I've put in the Z1 clutch line, motul 600 clutch fluid, helper spring & the TWM SS. My transmission is pretty much perfect as it does not "lurch" at all, but as my friend seeyabud86 stated the Z does not like to be redlined in first then quick shifted into second. The rest of my gears are fine 2-6 no problem. What I do now is just shift right before redline in 1st & I'm golden.
For what its worth: Drop engineering has transmission mounts that might help some of us. |
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With the 350Z and clutch adjustment, I remember adjusting it in the wrong direction and getting almost the same feeling as if the clutch wasn't fully disengaged despite the pedal being fully depressed. It would allow me to engage sooner, but that was the draw back. To alleviate this issue, I had to raise the engagement point. Right now the engagement point feels a bit lower than stock (near the top). It makes me wonder if this adjustment will help resolve this issue. :confused: |
hmmmm interesting
no lurch for me at all when clutch fully depressed and 1st gear engaged. |
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I experience a similar problem to the one described here. When I'm slowing down to stop at an already very slow speed (about 5mph or less), when I press the clutch pedal and shift into neutral, I hear a loud clank, and the car lurches forward. Could this problem be relative to the shifting into first lurch and thud?
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Strangely, I have always had a thud when shifting into reverse. Going into first is sometimes very difficult (embarrassing at stop lights) and I have to go back to neutral, clutch out, clutch in, then back into first and it usually works fine. I'm pretty used to that though b/c my old mazda3 and 330ci did this too. There isn't any lurch forward that I can detect but I'll try on a more level surface.
This is a bit off topic but the idea about realigning the shift gate got me thinking. My upshifts into 2nd were always very notchy and sometimes downright gritty for the first 4k miles. The only reason it got better was because I learned by accident that if I move the shifter closer towards the drivers side as I'm engaging 2nd the notchyness is almost eliminated. Before, I would engage 2nd with more of a diagonal motion towards the rear and away from me. Now I pull the shifter almost straight back at first then, a sort of jog to the right to seat it in gear. Sounds ridiculous I know but it works. It seems like that particular issue could be related to the shift linkage and gate and not so much the transmission itself. OT rant over. |
I know I just hear the rattle/marbles-in-a-can thing when coasting to a stop (esp going into garage) and depressing the clutch. Also hear it when starting from a stop in 1st, but releasing clutch too soon. Other folks hear this too?
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It just dawned to me the 1st gear thud/clunk, lurching, rattling, and getting locked out at redline is nothing new. The 350Z had these issues. The notchiness is very similar, but I was still able to get in and out of gear in the 350Z. It didn't like fast shifts, which I hardly do for daily driving.
I'm not too peeved by the 1st gear lurching unless it's directly responsible for issues getting in and out of gear (seriously like shifting without using the clutch) whether moving or from standstill. It comes and goes, which is what's driving me nuts. When I had trouble getting out of 1st, I pumped the clutched a few times without any luck. I had to use more muscle to get it into neutral. Juddering is still there, but it is not as frequent compared to the notchiness. When it comes back, it's like an earthquake. It judders a tiny bit everytime I get it moving in 1st. I checked the fluids... still max level. Anybody take it in for adjustments, bleed, etc. yet? |
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I too get the issue of sometimes not being able to go into 1st when I want. I usually go into 2nd no problem. As stated on the first page I think its something Nissan did intentionally to keep you from going into to low a gear. I know the e46 M3 had a similar design, at certain speeds gates would close to prevent engine damage.
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My anniversary has the lurching and lock outs every down shift from 6th to fifth and second to first. Im on the second tranny because it grinded like crazy from first to second on the first one. I havnt had a great experience with these trannys. The clutch slave cylinder is garbage and they locate it inside the tranny bell so it makes it a nightmare to work on for your average joe. i put TT and a stage one clutch and my pedal is stuck to the floor and had to be towed home with 13000 miles on the car and only 700 miles on the new clutch. CSC NISSA FAILLLLLL!!!! Tranny seems to be very reliable for your everyday casual driving but if you drive them a little harder they become loud and very hard to shift. There is after market fixes tho and after you do them the car usually is trouble free but then again why the hell we need to spend 40000 to have to spend extra money on after market. well it is what it is. Still worth buying zs in my opinion. My zspeed slave should be here and done by next week ill keep you guys up to date on how it feels
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its not full carbon fiber, its carbon composite whatever that means.
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^maybe we're both right?
check under "drivetrain" 2011 Nissan 370Z Coupe | Vehicle Specs | Nissan USA in any event, is that what causes the drivetrain whine at high rpm? |
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i definitely get this slight lurch when engaging first. leads me to slip the clutch a second longer to avoid it :\
however i've never had any problems getting into gear |
Just as an update for you guys in regards to the more than usual effort required to shift gears. There were a couple of things. Over the weekend the shift effort seem to have improved.
A quick check underneath the car revealed the rubber boot that covers the bottom end of the shifter that connects to the linkage was ripped off. Somehow the boot snagged, which may have been the reason for the difficulty getting in and out of gear. Next up was to bleed the clutch fluid, and there were some air bubbles present. After a whole day of driving, shifting effort is much better with silky smooth engagement. There is a tiny bit of effort getting out of gear from park, but it's nowhere near as bad as before. Therefore, no more clunking... hopefully all goes well from here on out. Lastly, if nothing works out, check the shift plate and have it realigned. |
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