One problem related to tank mounting has been reported for the 1996 Ford F-150. The most recently reported issues are listed below.
Fuel leaks from the fuel tank. When vehicle is parked or in motion fuel runs out of the truck from the opening of gas tank. When gas cap is taken off fuel starts to squirt out due to pressure. Dealer advised consumer that defect was due to check valve being faulty and built pressure inside tank. Dealer had ordered check valve from manufacturer for the front and back pump. Both pumps were still defective. Dealer went to a third company for operative part.