I stopped at the stop light and tried to put it in 1st but my clutch just gave way, it was soft. My clutch is all the way down and does not have pressure to push back. I can not put it in any gears, had it towed home.

Here what I've done:
-Check clutch fluid, good.
-took off the tranny and replace street/strip clutch to stock and same ACT pressure plate, same problem.

Anything else I should check? Is it clutch or tranny problem?

 

change clutch master cylinder or clutch slave