IS IT RED OR GREEN DROPS, IF ITS RED, THEN YOU HAVE A TRANS MISSION LINE LEAKING, IF ITS GREEN THEN YOULL PROBABLY NEED A RADIATOR OR A WATER PUMP OR A HOSE.
RepairPal Certified shops can diagnose and repair your 2003 Ford Windstar. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Drops are brown looks like oil to me.