The weather recently got cold here in Florida. And out of no where in the middle of traffic, my clutch pedal starts randomly sticking to the floor. It's not a consistent thing though. Sometimes it will stick all the way other times it will stick halfway and pop back up other times not at all. Any suggestions? Sometimes ( very rarely) the car will get stuck in first gear as soon as I press the clutch down and it sticks to floor. 07 350z nismo.

 

Csc us taking a dump on you

 

This^^ or other hydraulic system (pending) failure, clutch master. But travlee is likely spot on as this is a known symptom a failing CSC on the HR (and above) models. Known fixes: HD concentric slave cylinder OR internal slave elimination (or CMAK - clutch movement alteration kit.) Both are by Z Speed Performance and I believe a couple of other companies ripped the ZSP design and copied it.

 

Had the same problem ...it was the Clutch Slave Cyl at the bell housing. Pretty easy to replace actually.

UPDATE: I see people more knowledgeable are commenting on the internal Hydraulic Throwout bearing, which apparently is referred to as CSC, which eliminates the Slave Cylinder on the outside of the bell housing.
I don't know what years they went with that (apparently the HR engine ones do). My 2005 has the typical slave cylinder on the outside. BUT if that were leaking you'd see evidence of that. Mine wasn't leaking, just failing

 

Don't use oem.....I did the first time and it crapped out a year later

 

I checked my brake fluid and there was none. I refilled it and the clutch seemed to be back to normal until my fluid got almost empty. Slave cylinder leak maybe?

if so how much for the repair cost on those anyway for an hr?

 

more than likely. i had the zspeed hd one, not a single issue with it

 

Depends.... internal CSC (concentric slave cylinder) on the HR requires trans separation/removal AND because it's internal, there's a likely chance that the clutch friction surfaces were exposed to fluid if it is indeed leaking - essentially a death knell to the disc. And, depending on mileage on existing clutch, may make most sense to replace it while the trans is out regardless of whether it was fluid damaged.

So, no way to estimate until it's all apart and it's determined the clutch needs R&R in addition to the CSC. Sorry to bear the bad news.

Check the hydraulic lines for evidence of leakage before dropping (or having it dropped).