Miata Mailing List: April 1994, Message #8


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   From: """Stephen H. An""" 
Subject: Re: REDLINE OIL in Diff.
   Date: Fri, 1 Apr 1994 09:59:51 -0500



Much as I hate to be repetetive, I believe the hypoid gears in the 
differential require the Extra Pressure additive (EP) which means it
calls for GL-5 rated oil. I would not put MTL or MT-90 in the diff. 
which are both GL-4 oils.

I know 2 people who shattered their Alfa diffs with MTL, they do drive
hard, though. Redline also does not recommend 75W90NS in the limited
slip diff. it needs some friction to work properly.

- Steve.

    Josh Block wonders whether you need the extra .1 qt. of synthetic oil to to
    p up
    the transmission. It probably doesn't hurt, and besides, you can use the re
    st
    to put in the differential.
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