Valvoline Synthetic gearlube ?

[Chuck Ciaffone <chuckc@ibm.net>]

The Rivergate instructions for the Datsun gearbox
suggest Valvoline Synthetic gearlube. Can't find it
at my local hardware cum autolube store. Before I go
chasing off to the big boyz, can someone tell me does
this come in a variety of viscosities (sp?) or is there
just one?  If there are many, which do I use?

So far I've been running the same 20W-50 pennzoil I use
in the engine (and used to use in the original 4-speed.
Izzat a no-no?

chuck
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chuck ciaffone chuckc@ibm.net