SST-6604 Transmission Fluid Fill Adapter 5R55W / 5R55S OTC 6604 Ford 307-437
This is a required tool to fill or add fluid to the 5R55W automatic transmission used on 2003-newer Ford Explorers, also fits the 5R55S Transmissions. Similar to OTC 6604, Ford 307-347 & CTA 7420 Transmission Fluid Fill Adapter Tools.