What type of rear differential fluid do you put in a 2002 dodge ram 1500 4x4 with limited slip end?

A 2002 Dodge Ram 1500 4x4 with a limited-slip differential requires a 75W-140 GL-5 gear oil that is specifically formulated for limited-slip differentials. Some brands may also advertise it as suitable for "LSDs" (limited-slip differentials).

Crucially: Do *not* use any gear oil that is not explicitly rated for limited-slip differentials. Regular GL-5 gear oil can damage the limited-slip clutches. Look for the "for limited-slip differentials" or similar statement on the bottle.

Always check your owner's manual for the manufacturer's specific recommendation. While 75W-140 is common, there might be a slight variation depending on your specific truck's options and climate.