Gear Oil

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10-29-2016, 11:22 AM

FiveNine

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Gear Oil

I was wondering what type of gear oil my truck would take. It's a 1999 Dodge Ram 1500 Sport 5.9 Magnum 4x4 with a rear diff of 3.55.

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10-29-2016, 11:23 AM

HeyYou

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Welcome to DF!

Gear lube.... 80W90, or, if you tow/haul a lot 75W140. Also need to pay attention to if you have a limited slip rear or not. If you do, you also need the friction modifier to put in there.

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10-29-2016, 11:26 AM

FiveNine

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How do I know if I have a limited slip?

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10-29-2016, 03:54 PM

jsmith1969

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Quote:

Originally Posted by FiveNine

How do I know if I have a limited slip?

Go here http://www.ramtrucks.com/webselfserv...527R%2527%2529
Click "equipment listing" on the left side of the page, enter your vin and it will give you your build sheet instantly and it will say if you have ls

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