What type of gear oil does a 1993 ford ranger take in the rear axle?

A 1993 Ford Ranger's rear axle gear oil type depends on the axle ratio and whether it's a limited-slip differential or not. Ford recommended using 75W-90 gear oil for most applications. However, some 1993 Rangers may have required a 75W-140 heavier weight oil, especially if towing heavy loads or operating in extreme temperatures.

To be absolutely certain:

* Check your owner's manual: This is the best source of information for your specific truck.

* Look for a sticker on the differential cover: Sometimes the recommended gear oil is printed on a sticker on the differential.

* Check the differential tag: The axle code (like 7.5" or 8.8") may be stamped on a tag on the differential housing itself. Use this information along with your owner's manual (or an online resource like a parts website using your VIN) to find the correct oil.

Using the incorrect weight oil can lead to premature wear on the gears and bearings. If you're unsure, it's best to consult a mechanic or parts professional to determine the proper oil for your specific Ranger's rear axle.