That is where the friction enhancers come in. My gearbox has a D type
Overdrive and like I said, it works fine.
-----Original Message-----
From: spitfires-owner@Autox.Team.Net [mailto:spitfires-owner@Autox.Team.Net]
On Behalf Of Bob Van Kirk
Sent: Monday, April 30, 2007 5:10 PM
To: s1500@comcast.net; spitfires@autox.team.net
Subject: Re: [Spit] Synthetic gearbox oil? Yay or nay
I'm not 100 percent sure but sometime ago it was
said that synthetic was a difinite no-no with the
overdrive unit. Something about it being too
slippery...
--- Joe Curry <spitlist@cox.net> wrote:
> It depends on what type you have in mind. Synthetic
> oil is very slick and
> if you don't have some chemicals in the synthetic
> oil that intensifies the
> friction between the synchronizers and the gears,
> you will constantly be
> grinding thegears as you shift. I am using Redline
> MTL and after several
> years, I am very happy with it.
>
> Joe
>
>
> ----- Original Message -----
> From: "S1500" <s1500@comcast.net>
> To: <spitfires@autox.team.net>
> Sent: Monday, April 30, 2007 3:15 PM
> Subject: [Spit] Synthetic gearbox oil? Yay or nay
>
>
> > I'm almost done with the gearbox rebuild and thus
> subsequent road
> > testing after that.
> >
> > Here's the brick wall I ran into: ran out of
> gearbox oil. I had 2
> > bottles(totalling almost 2 bottles worth) of
> Valvoline 80w90 I put in.
> > But with a rebuilt overdrive, it is needing quite
> a bit more.
> >
> > So I bought some of the same type. Only after I
> brought it home did I
> > realize it had the word synthetic on it, looking
> like the original.
> >
> > I can't find regular tranny fuild anywhere in the
> twin cities. Pep
> > Boys(only place that carries Castrol GT-LMA brake
> fluid) only has
> > automatic tranny fluid.
> >
> > So..
> >
> > Is it safe to fill the remainder with synthetic
> 80w90, or will it digest
> > the syncros?
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