Auburn Pro Diff Fluid

I don't know about that brand but the 90's all had limited slip rear end so you need limited slip fluid or a friction modifier.

And as I recall off the top of my head it's not 90 wt. Ask you parts dealer to look it up.
 
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I found with my Auburn it didn't like friction modifier or fancy royal purple stuff. Just el cheapo conventional gear oil.
 
Conventional fluid with friction modifier is what is in my sons mustang gt. Works great.
 
I'm using Lucas conventional gear lube and Auburn friction modifier.

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David
 
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