[Healeys] Diff oil

[Bob Spidell]

There's some debate that the EP--'Extreme Pressure' sulfur 
compounds*--additives used in GL-5 are not suitable for gearboxes with 
brass or bronze components. But, at most they may turn these copper 
alloys blackish and I've never heard of any issues in Healeys. I've used 
MT-90, which is GL-4 with somewhat less EP additives, in both my Healey 
gearboxes for years, and when I tore down the BJ8's gearbox the brass 
components were pristine. I use Redline 75W-110 GL-5 in the BJ8's diff 
with no issues.

Sniff some GL-5 sometime, and see if it doesn't smell a bit of brimstone.

bs

On 8/1/2021 9:24 AM, Michael Oritt via Healeys wrote:
> Tom--
>
> Its base--synthetic or dino--does not matter though I prefer the 
> former.  However its GL rating DOES matter, and you should be using a 
> diff lube with a GL5 rating which will better stand up to the shearing 
> forces in the differential.  Engine oils or /GL4 transmission oils are 
> not sufficient.
>
> On Sun, Aug 1, 2021 at 11:40 AM Tom Felts via Healeys 
> <healeys at autox.team.net <mailto:healeys at autox.team.net>> wrote:
>
>     BJ8-----I'm changing oil inn the diff and had some synthetic
>     75-140.  Is that OK to use there?
>
>     thanks'tom
>

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