[Archrms]

Its been years since I've rebuilt a trans, but we used to test the circuits with compressed air. The compressed air will activate the different clutch packs when applied to the correct line (usually at the valve body to test the entire circuit, or directly to the drums in some cases) so that you can verify that they are working properly. I don't remember if there was a way to test the pump itself. Maybe someone else can help there.