This is what's happening, I'd appreciate any insight: the car shifts fine while I'm driving, but once I stop at a redlight, put it in neutral, clutch pedal up, wait for green, clutch pedal down, doesn't go in ANY gear (no grinding or anything, just as if there is a wall there). I have to play with clutch up/down, then maybe it goes in 1st or 2nd. I experimented a bit in the parking lot tonight and what I noticed that once I turned the engine off when this thing was happening (clutch pedal was down) it went in gear as smooth as butter. I tried it several times and it was consistent. What's happening here?