I need car help!

sorry i think you should consult a car specialist

i found this for you on a 98 ford windstar dont know if it would be the same on 2000 we also have this type of vehiclw but never had to change ours yet Disconnect the negative battery cable. Remove the accessory drive belts. Remove the alternator. Remove the accessory drive belt tensioner. Remove the power steering pump pulley using a Steering Pump Pulley Remover (T69L-10300-B) or equivalent. Position a drain pan under the power steering pump. Disconnect the power steering pump pressure and return hoses. Remove the power steering pump retaining bolts (three in the front, one in the rear) and remove the pump from the support. Remove the pump support from the pump to install! Install the pump support on the pump and tighten the fasteners to 30-40 ft. lbs. (40-55 Nm). Install the pump and tighten the retaining bolts to 30-40 ft. lbs. (40-55 Nm). Connect the power steering pump pressure and return hoses. Install the power steering pump pulley using a Steering Pump Pulley Installer (T65P-3A733-C) or equivalent. Install the accessory drive belt tensioner. Install the alternator. Install the accessory drive belts. Connect the negative battery cable. Fill the power steering reservoir with premium power steering fluid to the COLD FILL line on the dipstick. I found this on the autozone website under Power Steering Pump Ford Windstar 1995-1998 Repair Guide