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Re: [T3] GL5 - MT1 safe for VW trannies


<x-charset iso-8859-1>That's excellent info, thanks mucho


----- Original Message -----
From: "King, Robert" <Robert.King@dsto.defence.gov.au>
To: <type3@vwtype3.org>
Sent: Tuesday, March 19, 2002 2:18 PM
Subject: [T3] GL5 - MT1 safe for VW trannies


> Greetings All,
>
> I live over on the vintagebus list but do read the Type 3 archive.
>
> I noticed a recent thread on the GL4 tranny oil requirement for VW's
> and thought I'd send you a post.....
>
> GL4 in a 90w is impossible to find in Oz (well I couldn't find anything)
> and I was using a Castrol 75 w 80 GL4 (from motorcycle shop of all things)
>  in my recently finished 23 window resto
> for fear that a GL5 would eat the syncros.  Wasn't perfectly happy
> with that weight as I thought it was a bit light for the diff...
>
> Started checking around and there is a 'new' standard for GL5
> which is GL5 - MT1.  Penerite here in Oz has a 80 w 90  GL5 - MT1
> available and the manufacturer swore that it was suitable for
> (in fact developed for) trannies with copper/brass/bronze components
(Copper
> alloys).
> Even says so on the back of the bottle!
>
> Being a bit suspicious of the manufacturers information I delved a little
> further
> into tech specs and the MT1 rating DOES mean that the oil
> must meet ASTM D130 "Stability in the presence of copper
> and copper alloys".....
>
> It looks like  'modern' GL5s with the MT1 rating are OK for VW trannies.
> I'm not saying I'd go with it if I could buy a 90w GL4 or even something
> like Redlines synthetic MT90.  BUT if you can't readily access oils with
> these
> weights and ratings it looks like GL5 - MT1 is OK..
>
> I changed to it on the weekend and the bus is  happier
> with the higher weight.....
>
> RobK
>
> http://www.splitbusaustralia.com
>
>
>
>
>
>
>
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</x-charset>

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