I believe that the factory recommended fluid is either a synthetic or semi-synthetic.
David Henry '94 CC 4x4 318 5Spd in MI
> Date: Mon, 29 Mar 1999 07:57:25 -0500 (EST)
> From: Christopher L Scott <clscott@cse.Buffalo.EDU>
> Subject: DML: Re: NV3500 shifts
>
> Whoa, whoa, whoa. I hear someone advocating "a good synthetic lubricant"
> to be used in the NV3500. Do you mean like synthetic motor oil, since the
> tranny takes motor oil? Or do you mean something like Redline MTL? I
> have heard of people with manual trannies which required motor oil and
> they put in Mobil 1, and promptly lost all ability to shift. The stuff
> lubricated so well, there wasn't enough friction for the synchronizers to
> work. I was under the impression that synth. oil in trannies was baaaadd.
>
> Christopher Scott
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