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Correct gear oil for transmission and rear end?

Posted April 25, 201213 yr

comment_388282

For my 1971 FairladyZ-L, what is the correct gear oil for the 5-speed transmission and rear end, not using synthetics?

The book says Castrol HyPoy but that doesn't seem to be available ...

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https://www.classiczcars.com/forums/topic/43049-correct-gear-oil-for-transmission-and-rear-end/

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April 25, 201213 yr

comment_388286

The 1970 Owner's Manual says:

Transmission: GL-4 SAE 80 or SAE 90

Differential: GL-5 SAE 80 SAE 90

The modern oils seems to only be commonly available in 80W90 which will be fine.

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https://www.classiczcars.com/forums/topic/43049-correct-gear-oil-for-transmission-and-rear-end/#findComment-388286

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April 25, 201213 yr

Author

Cool! Thank you!

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https://www.classiczcars.com/forums/topic/43049-correct-gear-oil-for-transmission-and-rear-end/#findComment-388287

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https://www.classiczcars.com/forums/topic/43049-correct-gear-oil-for-transmission-and-rear-end/

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