In the car just find a way to jam the flywheel/flexplate. I do it with a screwdriver or a flywheel turning tool. Out of the car and on engine stand is also easy. Put two flywheel bolts into the crank with an open hole in between them. Place a tire iron between them like you want to turn it. Rotate the crank until the tire iron wedges against the arms of the engine stand, and then apply the torque to the bolt. I use a long breaker bar with a pipe extension over the bar.
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