Re: SER1 Which Gear Oil?

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Hi Graham,

For our high-performance 4 speeds we recommend API GL-5 MT-1 SAE 90 
petroleum-based oils.  The MT-1 subspec puts back the yellow metal 
protection that was deleted from stock GL-5.  Avoid synthetics unless you 
have prior experience with the formulation, they can make synchronization 
impossible (too slippery and too tenacious).  I use Valvoline in my 80"; 
don't know what's available where you are.

George E Sollish	Chief Engineer		Auto Gear Equipment
 			Project Manager		The Payne Lake Project

On Fri, 24 Jun 2005, GRAHAM WOOD wrote:

> Date: Fri, 24 Jun 2005 17:23:05 +0100
> From: GRAHAM WOOD <threemoles@xxxxxxxxxx.xxx>
> Reply-To: series1@xxxxxxxxx.xxx
> To: Series 1 list <series1@xxxxxxxxx.xxx>
> Subject: SER1 Which Gear Oil?
> 
> Hello all,
>
> It's high time I changed all the transmission oil. All the EP90 available now seems to be GL5 spec with high sulphur levels, what is most readily available seems to be EP 80W/90 to  GL4 spec which still has some sulphur but at a much lower level.
>
> At the moment I've got straight non EP sae90 gear oil in the gearbox, transfer box and overdrive; and the EP80W/90 in the axles and swivels.
>
> How big a problem (if any!) is the supposed eating of yellow metal bushes by the sulphur, is it worth worrying about?  What do other people use or recommend?
>
> It's a 1957 88" that is in daily use and does regular heavy towing.
>
> Thanks,
> Graham Wood
>

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