While driving on freeway, engine started to miss/hesitate. No check engine light. Miss/hesitation started to get more frequency and started smelling gas. No check engine light. Took offramp and truck died at stop sign. Pushed truck to gas station. Once out of truck, the smell of gas was prominent. Checked under hood and saw nothing unusual. Looked under truck on driver side and saw gas dripping from the transmission to the bumper under the truck. Looked under passenger side and saw more gas. Walked around to driver side, opened the driver door (which turns the fuel pump on) and saw gas spraying from under the truck. Got under the truck and determined that the supply connector on front side of fuel tank was disconnected. I reconnected the connector, clipped it locked, checked for leaks and restarted engine. There have been no further problems. Determined that approximately 10 plus gallons of gas sprayed under the truck. Approximate milage at time of incident was 6500 miles, current mileage is 6900 miles. I have purchased and plan to replace the following Ford part numbers per the Ford workshop manual which contains the connector and downstream fuel line: PC3Z 9J280, LC3Z 9S278.