Doesn't make sense what you are trying to do. Are you trying to remove the engine from the car, but leaving the gearbox in place. If so, then to separate the two, needs all bolts between the two removed. Once that is done, you may need to use a screwdriver or crow bar to lever the two apart. The engine would have to either be held supported on stands or via the crane. Then the gearbox pulled away from the engine. I always think the best way of doing it is to remove the gearbox first, then remove the engine. It is worth noting you should remove the engine mount of the offside off from the engine if you plan to lift the engine from the bay rather than underneath the car.