[T2] link to Amsoil ASTM-D130 tests of gear oils safe for yellow metal synchros

[Chris]

Talk with the trany rebuilders. I think you will find that they no longer use yellow metal in the synchros.

Chris

Sent from my Verizon Wireless 4G LTE DROID

MUTS <muts at verizon.net> wrote:

>http://xlforum.net/vbportal/forums/showthread.php?t=1533539
>This is of great concern to early car owners like Corvair.  Current 
>hypoid transmissions using GL-5 with no yellow metals can have  twice 
>the sulfur compound that eats yellow metals, and the copper strip test 
>indicates the safety of the oil as to its rate of corrosion. Not all 
>synthetics are safe- IE, the Lucas one is rated 4 on the strip test, 
>turned the strip jet black (maximal corrosion) in the 24 hr test.
>
>MUTS  = Michael's Ultimate Thumb Saver oboe, clarinet support
>93 Chevy Roadtrek 210P
>78 VW Westfalia Camper
>
>On 11/22/2016 12:28 PM, david raistrick wrote:
>> On Mon, Nov 21, 2016 at 9:37 PM, John Kolak <jkolak at gmail.com> wrote:
>>> Last I heard, the gear oil question is obsolete because all modern
>>> gear oils are now yellow metal friendly.
>>>
>>
>> not really - even in the new Mini world (2002+) we deal with it, some
>> of the transaxles only take gl4 - the gl5 additives will do the usual
>> (some of the bmws, too, come to think of it, but I mostly dont work on
>> those).   Some of the synthetics are safe, but the dyno gl5's are just
>> as bad as they've always been.
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