* Engine: The size and type of engine installed (e.g., 4.9L, 5.0L, 5.8L, or the optional 7.3L diesel) dramatically affects towing capacity.
* Cab and Bed Configuration: Regular cab, extended cab, or crew cab, and the length of the bed (6.5ft, 8ft) all influence the truck's weight and thus its towing ability.
* Axle Ratio: The rear axle ratio (e.g., 3.55, 4.10) impacts the truck's gearing and towing power.
* Options: Features like a tow package (which includes a heavier-duty transmission cooler, wiring harness, etc.) significantly increase towing capacity.
Therefore, there's no single towing capacity for a 1996 Ford F-150. To find the precise towing capacity for a specific 1996 F-150, you need to locate the original sticker (usually on the driver's side doorjamb) or consult the owner's manual for that particular truck. The information will be listed there.
Without knowing the specific configuration of the truck, I cannot give you a definitive answer.