What is Up with These Clutches!?

Chuck33079

Dude. It's a failing master or CSC. It's the most discussed topic on this site. The OEM ones fail. The only solution is to replace the OEM CSC with an aftermarket one.

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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

radensb

If it is the most discussed topic here, then there should be a better answer to exactly what is happening. While I agree that aftermarket is the way to go, there is no way consumers would tolerate a $1500 - $3000 repair every 6 months and that leads be to believe that there is another issue here.

A failing CSC would not suddenly work as normal for months of driving with just a fluid flush. Failed seals, as you suggested, means leaking. I don't have this and no fluid is leaving the system. This means one of two things.

1. Fluid is going somewhere else when I press the clutch (not sure how that could be possible, where would it go and how would it get back into the reservoir?)
2. It is breaking down and boiling allowing for comprehensibility.

When I flushed the fluid 3 months ago, with the exact same symptoms, the problem was gone. If the CSC was failing, that would not be the case.


Is everyone here with an OEM CSC getting it replaced every 6 months?

jaytirbhaw

not every 6 months, but I would venture to say everyone that drives their Z regularly WILL have the OEM CSC fail eventually, so it won't hurt to replace it while you're ahead of it happening.

If it is just your master failing, you'd still want to replace both, saves the headache

radensb

I agree. The OEM unit is crap and will eventually fail. But being that I just had my master and CSC replaced, and solved this once before with new fluid, I dont think failed parts are my issue. Besides, half of my driving is on the freeway with little to no shifting so its not like im aggressively wearing it out.

jaytirbhaw

That fluid won't give you much improvement for long, If you really feel like its not the master or the slave, i would recommend flushing with some redline fluid, If it still feels like crap it is the master, and yea hate to say it but they have been known to fail that quickly. Which is why no one recommends replacing with the oem parts.

Chuck33079

I'm not sure why you keep arguing. You can try and rationalize things, but at the end of the day you aren't the first person to have your problem. Guess what ended up being the issue for all those other people? The answer has been given to you several times in this thread alone, not to mention the thousands of similar posts on this forum.

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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

radensb

Dealerships must love you. Lets just replace things without truly understanding what is wrong. I'm not arguing because I am not open to the possibility that the parts are failing again. I am pointing out the inconsistencies in the suggestions and my symptoms. Inconsistencies that no one has yet to actually explain. This is how you explore possible causes and discover solutions. I don't want to just fix this, I want to understand exactly what is happening in MY situation that coincide with the contradicting symptoms that I have. Do you know what else happened to all those people that got their master and slaves replaced and had their issue resolved? They all got new fluid too. Are you going to tell me that there is no way that couldn't have been the problem all along?

Here are the facts for my situation:

• No Fluid Loss
• Pressure only decreases after long periods of not shifting and while the car is driving. If it sits in the garage all night, it is still fine the next morning.
• Pumping the peddle after not shifting for a while returns pressure and pressure is consistent with regular usage in city driving.
• Flushing the fluid corrected an un-drivable situation already for months of regular/daily use and before that situation was corrected, the issue was relieved after only seconds of stopping and starting the engine.

If the system was leaking, I would be loosing fluid and a fluid flush would not 100% correct the problem for months and the actions that were taken to relieve the previous issues have no influence on the parts. This is why I am leaning on issues not related to the parts them self.

When people replace the CSC with an aftermarket, are ALL clutch issues resolved permanently? Are they replacing the master with an aftermarket too? Are they still using GT-R or equivalent fluids?

jaytirbhaw

everyone that replaces the CSC also replaces the Master at the same time, it is a must, if they haven't then it will fail. There is no after market master, but an aftermarket CSC often reduces the chance of master failure, they go sort of hand in hand IIRC.

GT-R fluid is not a fix its just the dealers BS. Redline is what most will agree is the fluid that is needed.

your symptoms are consistent with master cylinder failure which takes place over a span of time. Either that or you're boiling your fluid all the time. But it is your car bro, we can all just offer suggestions.

JARblue

The CSC/CMC issue has been discussed at length and fully explained in many, many threads on this forum previously. I'm am sorry that you could not take the time to search and understand for yourself. You have taken a very argumentative approach, which is why you're getting the curt responses. Replace your CSC with an aftermarket solution, replace the CMC with a new OEM one, put in some Motul RBF600 fluid, and be done with it. If you want to argue with that, then you deserve to have to deal with OEM CSCs failing for the duration you own the car

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MJB

Dude, I argued with this guy before... He kept insisting that normal street driving was causing the fluid to boil which was causing pressure loss. I told him over and over that if just installed the Zspeed HD CSC then the issue would be over. Its bad seals in the CSC, what more do we have to say about that?

*OP, call Zspeed Performance @ 937-665-0450 and ask for Joe. He will explain everything in depth if you are still in doubt with what we have already told you.

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09 Nismo #0483 sold. Viper or C7 next time around.