Interesting, I wonder what the difference is between EP and Hypoid?
On 12/23/04 12:46 PM, "Michael Salter" <email@example.com> wrote:
> 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
> -----Original Message-----
> From: firstname.lastname@example.org [mailto:email@example.com] 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" <firstname.lastname@example.org> 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
>> I run it in my 54 BN1 and with an non-rebuilt engine that leaked badly
>> 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
>> 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
>> sheet for each.
>> If I can be of service just let me know.
>> Merry Christmas and Happy New Year
>> At 08:24 PM 12/22/04 -0600, you wrote:
>>> Rich, 20-50 is better for our engines, newer engines use tighter
>>> so the thinner oil is better to flow into those tight spaces and
>>> everything quickly and thouroughly, on the old healeys and other old cars
>>> with greater tolerances the thicker maintains the oil pressure betteroil
>>> 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: email@example.com