You absolutely must consult your vehicle's repair manual or a reliable online resource specific to your truck's transmission. Using the wrong torque can lead to leaks, stripped threads, or damage to the transmission.
Searching online for "[Your Transmission Type] transmission pan bolt torque" (replacing "[Your Transmission Type]" with the specific transmission in your F-150) will likely yield the correct information. The owner's manual might also have some general guidance, though it may not provide the specific torque value.