To find the correct capacity, you must check your owner's manual. The manual will specify the capacity for your specific transmission (e.g., E4OD, C6, etc.). The manual should also specify the type of transmission fluid to use.
If you don't have the owner's manual, you can try:
* Checking the transmission dipstick: The dipstick itself might indicate the fluid type and capacity, though capacity isn't always listed.
* Searching online for your truck's VIN: Using your Vehicle Identification Number (VIN) might help you identify the transmission and then you can search for the capacity online via reputable automotive websites or forums.
* Consulting a Ford dealership or a parts store: They can help you identify the transmission based on your VIN and provide the correct capacity information.
Without knowing the exact transmission, any capacity I give you would be potentially incorrect and could lead to overfilling or underfilling, damaging your transmission.