Dealer Info on TSB for CSC Issue

JARblue

GT-R fluid is just a way for them to upcharge you. It's nothing other than a better fluid - it does not help the CMC or CSC issues other than helping to prevent the fluid from boiling. If you're upgrading, I would recommend Motul RBF600 - it's better fluid and not more expensive (locally, I find RBF600 cheaper than GT-R fluid).

The OEM pedal does allow for some adjustment. But it doesn't really do anything other than change the pedal travel length. The engagement doesn't change, and that stupid double-hinge spring action is exactly the same. There are two clutch switches - upper and lower. You can screw in or unscrew either or both switches to shorten or lengthen the pedal travel, respectively, but it doesn't do much. If you adjust the lower switch too far, the car may not start or it could possibly prevent the CMC from actuating fully. The upper switch is a cruise control switch that might prevent it from working if not properly adjusted.

I recommend one of the ZSpeed options when your CSC goes. And the RJM clutch pedal allows for a lot more adjustment and has a linear pedal. The entire stock clutch hydraulic system on the Z is $hitty and ideally should be replaced asap

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BBQdDude

Isn't stock DOT3. GTR is DOT4. This would give better lubrication under high temperature situations? Not that it will "fix" the issue but it is good to use DOT4 for the above reason.

JARblue

It doesn't appear that you read the bold part of my post Yes. The GT-R fluid has a higher boiling point than the stock Z fluid. I just wanted to point out Motul RBF600 has an even higher boiling point and costs less.

If you're boiling the clutch fluid, you're obviously driving it hard enough that you should be taking into account certain OEM components that may not hold up under the aggressive conditions. So you should be considering higher temp fluid BEFORE any of the clutch hydraulics start failing. Brake fluid is another example - Car & Driver gave the Z terrible ratings because they took a stock Z and drove it hard on the track with stock fluids and the brake fluid boiled and they crashed ... idiots.

The TSB is bull$hit; fluid is not causing CMC or CSC issues. If fluid were the cause, all failures would be under hard driving or at least hot temp driving. But a CSC on a Z with less than 1000 miles failing in the dealer parking lot is due to shitty parts, not the fluid.

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onzedge

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BBQdDude

My bad, you are right I missed that