The manual will specify the correct viscosity (like 75W-140, 75W-90, etc.) and the type of gear oil (conventional, synthetic, or synthetic blend). It will also likely list the required API specification (e.g., GL-5).
Without knowing your specific axle configuration, I cannot give you a definitive answer. Trying to guess could lead to serious damage to your axles. Look for information on your axle's sticker, usually located on the differential cover. This sticker often lists the recommended gear oil.
If you can't find your owner's manual, you can try:
* Ford's website: Search for your vehicle's information and look for owner's manuals.
* A Ford dealership: They can help identify your axle type and recommend the correct gear oil.
* A reputable auto parts store: Provide them with your vehicle's year, make, model, and engine, and they can help you find the correct oil using their lookup systems. However, double-check with your owner's manual to confirm.
Using the incorrect gear oil can severely damage your axles, leading to costly repairs. Always prioritize consulting your owner's manual or a qualified mechanic.
