580B transmission Flush

Hello there folk's , I have a 580B with the slow moving issues that most seem to have . I am getting ready to flush the tranny & replace seals on the shuttle pump . my question is , rite now the tractor is parked on a small incline & wondering since I will be pulling the shuttle pump will I be able to remove any low fluids that don't make the drain with a suction pump ? I can't move it as the front axle is out just getting new ends . & Question # 2 I havn't seen about filling the Torque Converter , does it fill from the sump , or is there a filler I don't know about ? tks animal