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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

Sae 90 gear oil?

Old 03-05-2019, 01:25 PM
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Sae 90 gear oil?

For the rear differential on on 95 4runner 4x4, the FSM says:

Oil type:
API GL–5 hypoid gear oil
Viscosity:
Above – 18* C (0° F) SAE 90
Below – 18° C (0° F) SAE 80W or 80W – 90
Is "SAE 90" a specialty oil I have to order from somewhere ? I can find 80W-90 gear oil easily, but I do not live in Alaska. I used that to top off what I have now, before I re-do the rear wheel bearings. I wanted to put the right stuff in.
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Old 03-05-2019, 01:39 PM
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Any that are GL-5 and have '90' on the end will do. Older lubes were suited for more narrow temp ranges; thus 90 weight. While more modern lubes are made such that they can exhibit the good characteristics
of a thinner oil while at low temperatures and still have the body that is needed at high temps. Don't worry.
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Old 03-05-2019, 02:13 PM
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It looks like "GL-5" is MARINE grade oil. I just put some Wally-Mart super-tech 80w-90 in. Gee whiz, good thing I am re-doing the bearings and it's not going to be in there for long.
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