TwinTurbo.NET: Nissan 300ZX forum - Change the diffy lube. But only use a GL5 synthetic>>
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Subject Change the diffy lube. But only use a GL5 synthetic>>
     
Posted by ZUL8TR on July 06, 2015 at 5:00 PM
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In Reply To I think I will try the Red Line MT-90 GL4 for the trans >> posted by WE350Z on July 06, 2015 at 02:21 PM
     
Message There are many good GL5 lubes out there like: Mobil 1 75w 90, Castrol 75w 90, Redline 75w 90 (NOT MT 90), Lucus 75w 90, Valvoline 75w 90, etc. They do not need the viscous slip additive but most come with it and that is OK in the Z diffy will do no harm.

I am assuming your diffy is in good shape and a higher viscosity isn't needed? Again look for any metal shavings in drain oil and on the drain plug.

If the magnetic drain plug only has black thick fudge and not alot stuck on it that is OK, normal.

ZUL8TR in Orlando,FL

     
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