S15 helical 1.5 cusco diff

[Nissan2nr22]

My S15 has a cusco 1.5 diff.

Im not going to assume that the previous owner took care of it, especially since this car sat forever with such low miles.

I found out from researching on cuscos website that I should most likely run 80-140 cusco fluid


I was wondering if ill be ok with redline mt-90 or redline shockproof instead, I have a lot of it sitting in my garage

[brndck]

mt90 is transmission fluid. I've never used it as gear oil for differential. I don't think they're interchangeable

motul makes killer gear oil. as does amsoil.

[Nissan2nr22]

I dont know much about diffs, I guess my main question is what oil to use other than the cusco ones they're too expensive/take too long to get

[brndck]

kaaz /thread

[TheRealSy90]

Use Motul gear oil.


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