MmHm. That's why I've been saying that the problem is a potential
problem, and long term. The hysteria over having just filled the
gearbox up with GL5 is absurd. As is the notion that not finding brass
flakes means there was no corrosion from the GL5. And the notion that
finding brass flakes means there was corrosion.
GL4 and GL5 are not that far apart. It's not until you get into
recommendations for GL2 or such that using a GL5 lubricant can spell
quick death. And at that, the operative word is "can", not "will."
J Constantino wrote:
> List:
>
> FYI, I know the use of GL4 and GL5 have been discussed
> here before. This is what Redline told me and what
> they recommend. MT-90 is listed as one of their
> manual trans lubes.
>
> > -----Original Message-----
> > From: Dave Granquist [mailto:Dave@redlineoil.com]
> > Sent: Wednesday, December 20, 2000 4:51 PM
> > Subject: Re: Gearoil for diff with bronze parts
> >
> >
> > >I have a sixties vintage Triumph with brass or
> > bronze shims and bushingsin the differential. The
> differential does not have a limited -slip
> > >setup.
> > >
> > >I have read that GL5 gearoil will attack the bronze
> > and that the sulfur and phosphates in the friction
> modifiers used in limited-slip gearlube will attack
> the bronze also.
> > >
> > >Should I use 75W90NS in my street driven Triumph so
> > I don't damage the bronze parts?
> > >
> > >Thanks.
>
> AND REDLINE SAYS:
>
> > In the '60's Triumph differentials a GL-4 gear lube
> > is called for, these don't contain a reactive
> sulphur additive so would not cause corrosion or
> pitting to brass or bronze.
> >
> > The Red Line GL-5 gear lubes (75W90 and 75W90NS)
> don't contain as much reactive sulphur as others, so
> doesn't corrode or pit the brass, bronze or copper,
> only darkening of the surface at elevated
> temperatures.
> >
> > In your Triumph differential as well as the
> transmission, I would recommend the MT-90 (a GL-4).
> >
> > Thank you for your interest in Red Line Oil.
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