Hi Bill,
We have been over this issue many times and unfortunately your assumption is
not exactly correct.
The Triumph TR2 - 6 series of cars up to 1971 use the same overdrive unit as
the Healey (Laycock DeNormanville "A" type) however the specified gearbox
oil is EP90.
They also have brass (or sintered bronze) synchro rings.
I have somewhere a letter from Laycock DeNormanville which indicates, very
clearly, that the choice of lubricant for the gearbox is entirely up to the
gearbox manufacturer and that the overdrive unit will operate correctly with
either EP or non EP oil.
Michael Salter
www.precisionsportscar.com
-----Original Message-----
From: owner-healeys@autox.team.net [mailto:owner-healeys@autox.team.net] On
Behalf Of WILLIAM B LAWRENCE
Sent: Thursday, December 23, 2004 12:44 PM
To: Jon McLeroy; Greg Lemon
Cc: Healeys
Subject: Re: Oli pressure and Oil viscosity
EP or Extreme Pressure additives are meant for gearsets having a sliding
contact, such as hypoid gears in the final drive. EP oils should not be used
in any assembly requiring operation of a friction component to assure proper
operation such as synchronizer cones in a transmission or conical clutch
brakes in an overdrive. Engine oil is the proper lubricant for these items
per the manufacturer and I don't think the "detergent/non-detergent question
even comes into play.
Bill Lawrence
On 12/23/04 8:37 AM, "Jon McLeroy" <jfm@spyderinternet.com> wrote:
> Greg and All
>
> Penrite Oil's recommendation for our Healeys is HPR 30 a 20W/60
> viscosity. The older cars do really prefer a thicker oil, when these cars
> were manufactured there was no such thing as multi-viscosity or synthetic
> oils.
>
> I run it in my 54 BN1 and with an non-rebuilt engine that leaked badly
with
> Castrol 20W/50 but with the HPR 30 has cut down on oil usage and very
> little to no leaking. Also in the gear box I have Penrite Gear Oil 30 a
> non detergent 20W/60, which also leaked but not anymore. In the
> differential is Mild EP, recommended for the early 4 stud axle when the 5
> stud was introduced in the BN2 the recommended flavor is Hypoid 80W/90.
>
> If any one would like a brochure packet please furnish your mailing
address
> and I'll get one in the mail. Should you have other cars besides Austin
> Healeys let me know and I will include a Penrite Lubrication
Recommendation
> sheet for each.
>
> If I can be of service just let me know.
>
> Merry Christmas and Happy New Year
> Jon
>
> At 08:24 PM 12/22/04 -0600, you wrote:
>> Rich, 20-50 is better for our engines, newer engines use tighter
tolerances,
>> so the thinner oil is better to flow into those tight spaces and
lubricate
>> everything quickly and thouroughly, on the old healeys and other old cars
>> with greater tolerances the thicker maintains the oil pressure betteroil
and
>> provides a greater cushion or film between the journals and the bearings.
>>
>> I think most on the list run 20-50 or some other thick weight of oil.
>>
>> Greg Lemon
>> 54 BN1
>
> Classic Auto Lubes
> 12803 CR 1222
> Tyler, Tx. 75709
> Ph: 903-561-4858
> Fax: 903-561-7177
> Email: jfm@spyderinternet.com
> www.classicautolubes.com
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