[DeTomaso] ZF Gear Lube Question

[Charles Engles]

Dear Thomas,


         I was sure that GL4 was the specified lube for the ZF.    That's
what I've used for the last ten years or so in both Panteras.  No known
problems.   The ZF reference book doesn't actually say GL 4 or GL 5.   The
red owners manual makes no mention of it that I can see.   Oh, well.   GL4
or GL5 seems to be OK.


                Warmest regards,  Chuck Engles



-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of Thomas Tornblom
Sent: Sunday, May 30, 2010 3:26 PM
To: detomaso at realbig.com
Subject: Re: [DeTomaso] ZF Gear Lube Question

2010-05-30 21:44, Jørn C. Olsen skrev:
> I`m a little confused!

Me too!

I've always heard that it should be GL4, but when Mike said that the 
users manual say GL5 I checked my manual, and it does indeed say SEA 80 
GL5 for US, and Agip F.1 Rotra MP SAE 90 for Europe.

I'm currently using Shell Getriebeöl, SAE 75W-90, which is a fully 
synthetic GL4 transmission oil. I've used Mobilube 1 SHC SAE 75W-90 
before, which is a fully synthetic GL4/GL5 oil, but changed it to the 
Shell oil when there was much debate about GL4/GL5 on the forum.

Both oils worked very well.

Checking the ZF manual they say "mild EP gearbox oil of viscosity class 
SAE 80". They also say SAE 80 oils corresponding to spec MIL-L 2105A, 
which appears to be a mono-grade GL-4.

The Mobilube 1 SHC is marked with MIL-L 2105D, which according to some 
document is multigrade GL-4.

Thomas

>
> I shall only use GL4 oil, correct?
>
> Not GL5!
>
>
>
> My local shop has a Castrol W80 GL4 oil!
>
>
>
> J.C.
>
>
>
> Fra: pantdino at aol.com [mailto:pantdino at aol.com]
> Sendt: 30. mai 2010 20:32
> Til: MikeLDrew at aol.com; JDeRyke at aol.com; joernco at online.no;
> detomaso at realbig.com
> Emne: Re: [DeTomaso] ZF Gear Lube Question
>
>
>
> Or it could be argued that you prove my point.
>
> If the oils have been "improved" in such a way that they are more slippery
> than the GL5's of 1973, which is entirely likely, then they are LESS well
> suited for this application.
>
>
>
> I still say go with the NS oil.
>
>
>
> Jim
>
>
>
>
>
>
>
>
>
> -----Original Message-----
> From: MikeLDrew at aol.com
> To: pantdino at aol.com; JDeRyke at aol.com; joernco at online.no;
> detomaso at realbig.com
> Sent: Sun, May 30, 2010 2:41 am
> Subject: Re: [DeTomaso] ZF Gear Lube Question
>
>
> In a message dated 5/29/10 15 53 12, pantdino at aol.com writes:
>
>
>
>
>
> One cannot assume that what was called GL5 in 1973 is the same thing being
> sold today, so that is of questionable validity.
>
>
>
> Uh...what?
>
> GL5 is a very specific standard which is unchanged; it consists of a set
of
> highly standardized tests that must result in specific minimum values.
Your
> statement is like saying that a 1973 inch might be longer or shorter than
a
> 2010 inch!
>
> Now, most oils today state that they exceed the GL5 standard (SAE J2360 is
a
> much more rigid standard, established initially by the US military, and
one
> that uses GL5 as its starting point, then adds to it with various
> performance benchmark tests; most oils today meet this higher standard),
so
> while it may be true that most 2010 oils are better than 1973 oils, the
> minimum standard that is established by GL5 is still the same standard.
>
> http://www.lubrizol.com/DrivelineAdditives/AutomotiveGearOil/GL5.html
>
> Mike
>
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-- 
Real life:   Thomas Törnblom             Email:  Thomas.Tornblom at Hax.SE
Snail mail:  Banvallsvägen 14            Phone:    +46 18 32 31 18
              S - 754 40 Uppsala, Sweden  Cellular: +46 70 261 1372

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