when driving the car like it should be, it shifts just fine. however when it is in a higher rpm arund redline and i go to shift, with the clutch pedal on the floor it doesn't seem as if the clutch disengages quickly enough for my shifting...and it grinds about 75% of the time...anybody ever have this problem. i don't know if i should get a tranny rebuild new pressure plate or waht...i changed the gear oil to see if that was the problem and it wasn't...still questioning the problem...