Here's why you need to provide me with more information:
* Axle type: What kind of rear axle does your truck have? (Common ones in F-150s of that era are Ford 8.8, Ford 9.75, Dana 44, and Dana 60). You can usually find this information on a tag on the differential cover, or in your owner's manual.
* Gear ratio: The gear ratio of your rear axle will affect the type of oil needed. It's typically stamped on a tag on the differential cover, or you can have a mechanic check it.
* Usage conditions: Do you tow heavy loads? Drive in extreme climates? The answer will affect the type of oil (synthetic vs. conventional, viscosity, etc.).
Once you have this information, you can:
* Consult your owner's manual: It will likely have a recommended oil type and viscosity for your specific vehicle.
* Contact a Ford dealer: They can provide guidance based on your truck's VIN.
* Check with an auto parts store: They can help you choose the right oil based on your axle type and gear ratio.
Remember: Using the wrong type of rear end oil can damage your axle, so it's crucial to choose the correct one.
