I have the same problem my shiftier was bad so i just replaced it i just got a new stage 2 racing clutch put in in december and my car will no move and if it does it gets stuck in that gear i just put in a new slave cylinder idk whats wrong with it and my battery keeps dying and its brand new not even a couple months old

check your peddle assembly there is a plastic part on the push rod that will pop out and it makes it so you can not shift.

last time my pin broke on me and my clutch peddle got stuck and wouldnt come back up i put a new one in but since i put the new shiftier in it shifts when the car is off just wont go into any gear when its on ill try to put it into first gear the car moves like an automatic while the clutch is all the way down

My pedal feels normal and all gears go in perfect except 3rd have to push with a little force to get into gear but once in drives smooth. I had the stock clutch changed in January to just a new oem one because it went out. If I'm parked with car on it almost wont go into 3rd at all.. clutch going already? I have n/a but is oem clutch good for intake hearders exhaust fidanza flywheel an light weightcrank pulley?

Definitely clutch related maybe actual clutch or hydraulic. How does your clutch pedal feel?

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Feels normal

sorry to bring this back from the dead after year plus..but I have the same exact issue. Car is currently at the dealer. But I have OEM clutch.. I have extended warranty so I hope it is covered.