Well this weekend I was out in my 93 mustang and for some reason it didn't want to go into gear. I adjusted the adjustable quadrant I have further, thinking maybe the clutch cable stretched, and the shifting problem isn't as bad getting it into gear, but when I drive the shifter vibrates horribly when the car is in gear. The car still gets up and goes fine, so I think the clutch is fine, but Im curious about the vibration. Could it be the throwout bearing? I really have no clue, so please give me some ideas.....