What gear oil for front and back diffs

ROGELIO A GUZMAN · Dec 1, 2020

Hey fellas what gear oil you guys using for the diffs. I'm kinda leaning towards aimsoil severe duty 75w90.

Any advice is really appreciated. And doing transfer case also. I think that is trans fluid. Correct me if I'm wrong. Thanks in advance.

mpope2 · Dec 1, 2020

Front diff is 80w90. Rear diff with factory gov lock is 75w90. Some aftermarket carrier manufacturers suggest different weights for various limited slip units. Some also require a friction modifier additive, some do not. If yours is OE, just do 80 up front and 75 out back and call it good.

Big Mama · Dec 1, 2020

If you have the owners manual it’ll tell you if limited slip additive is needed out back.

ROGELIO A GUZMAN · Dec 2, 2020

Big Mama said:
If you have the owners manual it’ll tell you if limited slip additive is needed out back.

Thank you

What gear oil for front and back diffs

ROGELIO A GUZMAN

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mpope2

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Big Mama

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ROGELIO A GUZMAN

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