[V8] Manual gear oil (transmission)

[kyle leatherwood]

I  have been told that GL5 transmission fluids will wipe out the synchros in older transmissions.  There is something in the GL5 fluids that eats up the brass that is in the older transmission synchros.  If I were to go with Redline, I would be sure to use the GL4 fluid (their MT90 I think) that the factory calls for and you should be good.
 
 
> Date: Wed, 6 Oct 2010 11:53:05 -0700
> From: thequattroking at yahoo.com
> To: rodtheviking at yahoo.com; v8 at audifans.com
> Subject: Re: [V8] Manual gear oil (transmission)
> 
> the 75W90 NS must be a newer one. when i called Redline a couple years ago,
> they told me not to use their 75W90, this one,
> 
> http://www.redlineoil.com/product.aspx?pid=133&pcid=4
> 
> in a gearbox. 
> 
> i wonder how the 75W90 NS differs from the MT-90, which is also a 75W90?
> other than the fact that the NS is a GL5 and the MT is a GL4.
> 
> 
> Shayne
> 
> PARTING:
> 1972 mercedes benz 280 se 4.5
> 1986 audi 4000 cs quattro
> 1990 audi coupe quattro
> 1995 audi S6
> 
> 
> > From: Chris Williams <rodtheviking at yahoo.com>
> > Date: Wed, 6 Oct 2010 10:13:10 -0700 (PDT)
> > To: V8 Audi Fans <v8 at audifans.com>
> > Subject: [V8] Manual gear oil (transmission)
> > 
> > sorry about that should have stated it was for the trans.
> > From what I can find I should go with
> > 
> > Redline 75w90 NS GL-5 (has additives for copper corrosion)
> > Moblie Synth 75/90w LS with the GL-5 designation
> > Castrol TAF-X 75w90 Synth (cant seem to find it yet)
> > 
> > 
> > I'm leaning towards the Redline
> > 
> > Any thoughts?
> > 
> > 
> > 
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