I'm certain that there was some loss especially when cold.. When
it was below +25 degrees F I would start it with the clutch pushed in,
and then let it out with the tranny in neutural it would drop the RPM by
a couple of hundred, but would rise fairly quickly as the oil heats up
pretty quick when it's thick. It's all just a matter of personal
choice. Engine oild has friction modifier for sliding action (rodm cam
and main bearings) where gear oil has friction modifiers for pressure
contacts (Gear teeth meshing, Roller and needle bearings), hypoid has
both for differential type applications.
This is also an old thread, and people will use what ever they
use.. There's only two real combination that don't work Engine oil in
the rear end, and Gear oil in the engine.
Rich
> ----------
> From: DSand95510(at)aol.com[SMTP:DSand95510(at)aol.com]
> Sent: Friday, July 18, 1997 8:49 AM
> To: Richard Atherton (Entex); alpines(at)autox.team.net
> Subject: Re: Transmission oil
>
> In a message dated 97-07-18 09:28:40 EDT, a-richat(at)MICROSOFT.com
> (Richard
> Atherton (Entex)) writes:
>
> > This sounds like Gear oil territory to me?
> >Which is why I always used 80-90w gear oil, because thats what it
> >is
>
>
> Just wondering. Besides the question of the thicker oil maybe not
> getting
> into tightly machined surfaces - how much power is lost by forcing the
> tranny
> to slog its way thru 80-90w instead of 30w? Given that we're dealing
> with
> Alpines, I for one don't want to give up even a fraction of a
> horsepower
> without a really good reason.
>
> Dick Sanders
>
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