I was driving along at about 75 car made a hard shift, kept doing 70 but RPMs dropped to 0. got to my destination ok (about 25 miles) shut it off restarted it stalled, restarted again but still 0 rpm. Shut it off waited about a half hour started it right up RPMs were normal. Drove 35 miles no problem 4 hours later drive for about 6 miles fine then at a steady 55 with cruise set 3 hard shifts each time tach goes to 0 but then comes right back up after third hard shift it ran fine the rest of the ride home. Any ideas I need this car for work Friday morning.I am leaning towards crank position sensor or cam sensor. But my local shop says he does not think so because there are no codes being thrown. Help guys. You have saved my butt before and I need you guys again. It is not misfiring. Also when I shut it off this morning (before any problems) it gave a gasp type sound from the lower right side of engine (I had the hood up and heard it) ICM has already been changed along with coil packs (This problem happened on a much larger scale 8 months ago car misfired as well and stalled abs lights and brake light came on and had to be towed when they started it next morning it started and ran fine they took it for a long ride until the problem reappeared )that is what they changed.