Sticky: (Official) 370Z Clutch Pressure (CSC) Failures

JARblue

This happens vice versa as well. The internals in the CMC aren't high quality either and sometimes fluid gets past the seals and introduces contaminants into the system. These contaminants can cause the CSC to fail. The master must have an o-ring seal or something that gets loose and then seats back into place because you can lose pressure and then have it return. In this scenario, you can typically return pressure to the master by pumping the pedal hard and fast for 20+ stokes. You'll probably have to use your hand to do this.

When the internal master seals fail and let contaminants into the system, the
fluid gets nasty colored immediately. This is a telling sign that your master internals slipped. Especially if you have an aftermarket CSC. I don't think dirty fluid is a symptom of CSC failure as it typically fails catastrophically, leaking fluid into the transmission bell housing.

All Nissan dealerships consider the CSC a wearable part. Anyone whose dealer covered the work either had warranty coverage or the dealership performed the service out of "good will". They have what they call "good will coverage" for customers that spend lots of money on service at the dealership already. If you DIY or just never use the dealer for service, then you're incredibly unlikely to have the good will coverage approved. I went over this matter with 3 different Nissan dealerships

Actually, that's probably the master. But a flush with higher temp fluid is definitely a good idea

Definitely replace the master if you do the slave. But in this case, I would start with the master. The OEM parts are about the same cost but the master is far less labor and the more likely culprit in that case.

You have the ZSpeed CSC? If so, I promise it's not your HD CSC that's having problems. It's the master. If you really want to go with one of the external slave kits, I don't think you can go wrong with either the ZSpeed or the Z1 solutions. And neither of them will interfere with an aftermarket exhaust as they are located adjacent to the driver side catalytic converter.

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