K, the tranny is an s4c (jdm b16a sirII, hydro) this tranny was PERFECT yesterday, here I'm driving today, put it in 4th, drive for a few seconds and it pops out of gear, I try to go into 3rd and second and it wont go (clutch is pushed in), let the clutch out and push it back in, and it went into every single gear fine, right now my 4th is fine, but it was popping out for about 30 minutes and now it seems to be ok, but I'm still wondering why it did it.. Could I be low on tranny fluid? I checked the clutch fluid and it was FILTHY, like almost black filthy, could that have something to do with it? I'm new to hydro trannies, I've ALWAYS delt with cable