Can I run 80W-90 for both difs and transfer case?

[brillo_76]

Never heard of master pro gear lube. If it meets the spec for the fluid. It will work just fine.

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[MarkBlack]

Heres a pic, in case you're interested.

 

[brillo_76]

Heres a pic, in case you're interested.

GL-5 spec. I dont see why this isn't just fine. Others may disagree but it meets the GL-5 specification.

I say when in doubt. Stick with what the FSM states. Lots of times newer spec comes out and we just have to verify its suitable for the application at hand.

I just cringe when someone posts which is the best fluid, oil etc. As those just become opinion threads.

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