You missed the step about removing the gearbox cover, even though it is shown as removed in the pictures. The motor cannot be removed with the gearbox cover in place. For anyone doing this repair, remove the four phillips screws holding the cover on and lift upwards. It is full of grease so have some paper towels handy in case any spills. When replacing the cover (after re-installing the motor) you may need to spin the gears (do this by rotating the motor fan) so that the accessory drive gear meshes properly in order for the cover to fit back into place. Be sure to align the planetary shaft with the recess in the gearbox cover as well.