Ok so I have a 2009 ss and I just recently put in a stage 3 clutch I also replaced my master cylinder I had the mechanic do all of it before I had the clutch replaced it would grind going into first even when stopped but now I have to pump the clutch 20 times or more just to get it into first and it still grinds it it will just scrap and won’t go in also if I have my clutch Pedal pressed all the way in and it in gear and hold it there the car will just stall even if my clutch is all the way in and sometimes it gets stuck to the floor also in reverse and and in first it will not let out of gear no matter how hard I pull this is usually when the clutch gets stuck to the floor and everything is just intensified for reverse I just need to know what the problem is so I can get it fixed and my car back up and driving mechanic thinks it’s the slave cylinder but I’m not sure

 

Sounds like its not bled properly.

I'm assuming the clutch install included a new TOB and clutch pipe?

edit: The slave cylinder is part of the TOB so if it wasn't replaced then likely that is part of the issue, although if it has failed it usually leaks.