The rear differential for a 2004 Ford Explorer is going to need to use 75w140 gear oil. The capacity will be 1.75 quarts so You're going to need to purchase a single two quart bottle if it is available or two separate one quart bottles. A single quart will cost between $12 and $25 depending on which brand You purchase and where You shop. This is one of the things You're going to want to spend a little extra money on in the short term to extend the life of Your vehicle so I prefer to go with one of the high end brands.
Temperature Viscosity Ratings Example: If you live in Minnesota, you should use 85w140. If you live in Texas, you should use 75w140. That's the best way to define it.
Jose
November 24, 2022
What’s the difference on sae 85-140
Ana J
July 16, 2020
The recommended rear differential fluid for a 2004 ford explorer is 75w140.
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