Today on my way to work i was at a stop sign and when traffic moved i went to put the car into 1st gear and it wouldnt go in. I tried 2nd 3rd 4th 5th and Reverse and it was like I was locked out off all the gears. I shut the car off and 5 minutes later I started it and it shifted smooth as gravy. Got to work and it wouldn't shift again. My buddy came down while I was working, drove it had the same problem after like10minutes of driving. So now I was pissed. I got off work like 30minutes later and then drove the car home. (25minutes drive) it was already warm and everything and the whole way home the car shifted perfect! This whole thing was out of the blue and im sure the issue is still there. could it be air in the clutch lines, low tranny fluid or what? Take this into consideration too. Around Early January this year I just had a Shep tranny put in with act 2600 clutch and a new slave clyinder. Any input?? I blew my last clutch up, I dont want to do the same with this one....