* 8.8-inch rear axle (most common): This typically uses 75W-140 GL-5 gear oil. Some sources may also recommend 75W-90 GL-5, but 75W-140 is generally preferred for heavier loads and better high-temperature protection.
* Other axles (less common): There were other axle options available in some 1997 Explorers (e.g., different ratios). If your Explorer has a different axle than the common 8.8-inch, you'll need to consult your owner's manual or a parts store with your VIN to determine the correct fluid.
Crucially: Always check your owner's manual for the *specific* recommendation for your vehicle. The manual will list the correct fluid type and capacity. Using the wrong type of fluid can damage your differential. The sticker on the differential cover might also have this information.
If you don't have the owner's manual, a local parts store (like AutoZone, Advance Auto Parts, or NAPA) can look up the correct fluid for your vehicle using your VIN.
