The correct transmission fluid for a Ford F-350 with an automatic transmission and Powerstroke diesel engine depends on the year of the truck. Ford has used different fluids over the years.
You absolutely MUST check your owner's manual. It will specify the exact fluid recommended for your vehicle.
Using the wrong fluid can severely damage your transmission, leading to costly repairs. Don't rely on general advice online; the owner's manual is the only reliable source for this information.
