Redline MT90 is fine although some people seem to experience
leaking/sweating of the gearbox. EP oils are in general best for all
steel gearboxes and most differentials.
Kees Oudesluijs
Michael Oritt schreef op 25-8-2014 22:41:
> Kees--
>
> Over here at least the products that are corrosive to yellow metals
> are labelled GL5 and are described as "Gear Oil", usually employing
> words such as "High Pressure or "Extreme Pressure".
>
> Some of these are rated as "GL4/5" but I am suspicious about their
> suitability for either transmission or diff: If they do not contain a
> mix that gives "Extreme Pressure" protection they may or may not be
> okay for brass parts but probably are not up to the loads that hypoid
> gears impose. OTOH if they are safe for the diff they might not be
> good for the transmission for opposite reasons.
>
> I'll stick with Redline MT90 in my transmissions, both street and
> track, and any quality diff oil.
>
> Best--Michael Oritt
>
>
> On Mon, Aug 25, 2014 at 4:31 PM, Oudesluys <coudesluijs@chello.nl
>
> SAE 30,40, 20W50 etc. is fine for OD gearboxes and gearboxes with
> brass/bronze parts like synchro rings or forks. Do not use EP80/90
> as they may contain F, Cl and other elements based dopes that can
> be harmful to certain parts.
>
> Kees Oudesluijs
>
> MIKE LEWIS schreef op 25-8-2014 22:14:
>
> Thought I would add that in the opinion of Healey trans/OD
> rebuilders like
> Quantam Mechanics and Healey Surgeons best oil for the Healey
> Type A overdrive
> is a non detergent, 30 or 40 weight. QM only recommends 30 wt
> from what I
> understand. The other oils like 20w50 that contain the
> detergent additives are
> not ideal for our overdrives. I use 40 wt ND which you can
> get off of Amazon
> as otherwise hard to find a 40 wt ND. think 30 wt ND is
> available from
> several sources.
> Regards
> Mike Lewis
> 1956 100M
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