The rear diff has a limited slip differential, the front doesn't.

 

Thanks for the quick reply dear.
So I hope following is the correct oil for each


EP80W-90 GL-5 (Front Axle) (S2G 80W-90 by Shell)

LS80W-90 GL-5 (Rear L.S.D) (I’ve only 85W-90GL-5 by Toyota)


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Correct. There is a guide at the top of this section on oils.

Oils and fluids for servicing

A summary of fluids used for servicing, please PM me your recommendations for makes and types and I'll edit the post. Keith Engine oil With filter change, 7.6 litres SAE 5W30 or 10W30/40 API CF-4 (Never use API CG-4) ACEA B1, B3, B4, B5 (Low ash for auto gearbox version)...

www.nissan-navara.net

It sounds like the oil you have already would be fine in the front, the difference between 80 and 85 is minimal.

 

Thanks dear, I’ll review the link, cheers


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