To find out what kind of gear oil your truck needs:
1. Check your owner's manual: This is the best source of information. It will specify the correct type and viscosity of gear oil for your specific axle.
2. Look for a sticker on the differential: Sometimes there's a sticker on the differential housing (the metal casing around the axle) indicating the gear ratio and recommended lubricant.
3. Check the axle tag: This tag is usually located on the differential cover or nearby and provides information about the axle type and ratio.
Once you have identified your axle, you'll need to know the following:
* Gear Ratio: This is typically expressed as a number like 3.55, 3.92, 4.10, etc. It's crucial for selecting the right oil viscosity.
* Axle Type: Different axle types (e.g., Dana 35, 7.25, 8.25, 9.25) might have different capacity and oil specification.
General information (but this is not a substitute for checking your truck):
Many 1996 Dodge trucks used 75W-90 gear oil. However, some might require 75W-140, especially in heavier-duty applications or if you live in a very hot climate. Some axles may also specify an API GL-5 rating.
Do not rely on this general information. Using the wrong gear oil can severely damage your rear axle. Always refer to your owner's manual or consult a Dodge mechanic/parts specialist to determine the correct gear oil for your specific truck.
