[Healeys] Gearbox oil volume

Michael Oritt michael.oritt at gmail.com
Mon May 25 19:42:09 MDT 2015


I have conducted "experiential" non-scientific experiments re synthetic
versus dino transmission oil in my Elva Courier race car--equipped with an
MGA gearbox.  Without a doubt shifting is faster with the synthetic (MT90)
with less crunching of synchros.  Leaking does not appear to be any
different.

Best--Michael Oritt

On Mon, May 25, 2015 at 9:28 PM, Price Lindsay <050.rpl at gmail.com> wrote:

> MT 90. No question!
>
> Price Lindsay
> 67 BJ8
>
>
> Sent from my iPhone
>
> On May 25, 2015, at 9:15 PM, Roggrace <roggrace at telus.net> wrote:
>
> I am about to change my g/b and o/d oil for first time since taking
> ownership; just to be sure that I know what is in there;
> and I don't want to start another gearbox oil discussion. .....
> However so many people recommend MTL or MT90 that are both synthetic.
> I am a little reluctant to as don't need any new oil leaks with synthetic;
> maybe already have synthetic ,,,.?
> Anyhow for convenience was planning to use same as use in engine -
> Valvoline VR1 20-50
> Any thoughts regarding synthetic oil and gearbox leaks from more
> experienced users appreciated.
> rg
>
> ----- Original Message -----
> From: Michael Oritt <michael.oritt at gmail.com>
> To: Oudesluys <coudesluijs at chello.nl>
> Cc: Austin Healey <healeys at autox.team.net>
> Sent: Mon, 25 May 2015 05:08:10 -0600 (MDT)
> Subject: Re: [Healeys] Gearbox oil volume
>
> I agree with Kees--you really cannot overfill the box and even if you do
> the car will leak oil anyway so at worst you will have a larger puddle of
> oil under the car.  Do be sure to use an oil with a GL4 rating or your
> yellow metal parts (synchro rings, etc) will not be very happy.  I
> recommend RedLine MTL or MT90.
>
> Best--Michael Oritt
>
> On Mon, May 25, 2015 at 6:36 AM, Oudesluys <coudesluijs at chello.nl> wrote:
>
>> Never bother about the quantity, just
>> fill right up until the oil overflows the filler plug hole, both
>> overdrive and gearbox if they are separate.
>>
>> When brass parts are used (e.g. synchro rings, selector forks, OD
>> parts) do not use EP "gearbox oil". Use straight oil, special oil
>> e.g Redline or 20W50 engine oil to save these parts in the box.
>>
>> Kees Oudesluijs
>>
>>
>>
>> Simon Lachlan schreef op 25-5-2015 om 11:47:
>>
>> That’s very interesting. Seems like
>> they got the whole thing into a muddle on Day One and never
>> really recovered.
>>
>> Makes trial and error, one of my
>> usual fallbacks, seem quite sensible in the circs.
>>
>> Simon
>>
>>
>>
>> *From:* Healeys
>> [mailto:healeys-bounces at autox.team.net <healeys-bounces at autox.team.net>] *On
>> Behalf Of *Keith
>> Taylor
>> *Sent:* 25 May 2015 03:20
>> *To:* healeys
>> *Subject:* Re: [Healeys] Gearbox oil volume
>>
>>
>>
>>
>> My original BN1 1954 Service Manual has
>> an  "ERRATUM '  sticker on the inside cover stating :-
>>
>>
>>
>>
>> Gearbox/overdrive Oil Capacity
>>
>>
>>
>>                             The
>> combined capacity of the Gearbox and overdrive is
>>
>>                              5 1/2 Imp.
>> pints (dry) and not 4 1/2 Imp pints as stated
>>
>>                             After
>> draining,  1/4 pint of oil will remain in the overdrive
>>
>>                             hydraulic
>> system, therefore ,only 5 1/2 pints will be required
>>
>>                              for
>> refilling.
>>
>>
>>
>>
>> Pubs. 996B and 997A December 1954
>>
>>
>>
>> So when filling from rebuild add the
>> extra 1/4 pint  ....   5 3/4 pints
>>
>>
>>
>> Later editions may have carried the
>> correction  and side and top shift gearboxes may vary
>>
>>
>>
>> Keith Taylor
>>
>> southern Highlands OZ
>>
>>
>>
>> On 25 May 2015 at 07:54, Patrick &
>> Caroline Quinn <p_cquinn at tpg.com.au>
>> wrote:
>>
>> Greetings
>>
>>
>>
>> Well that’s
>> interesting as I will be buying the oil for the
>> BN3’s gearbox this week. It is a 100S gearbox with a
>> 22% OD that has been completely rebuilt and apart
>> from the oil used in the assembly it’s completely
>> empty.
>>
>>
>>
>> My 1968 BMC
>> Workshop Manual (AKD 1179H) that I bought new in
>> September 1974 for $7.00 states that the oil
>> capacity for a side-shift gearbox fitted with an OD
>> is 6 ¼ imp pints, 7.5 US pints and 3.55 litres. I
>> states the same for a centre-shift box as well. So I
>> will be buying a 4 litre container and store what’s
>> left over for the inevitable leaks.
>>
>>
>>
>> Talking about
>> leaks I was watching a Jay Leno video of his Daimler
>> SP250 over the weekend and he made mention that all
>> things over 50 or 60 years of age are bound to leak.
>>
>>
>>
>> Hoo Roo
>>
>>
>>
>> Patrick Quinn
>>
>> Blue Mountains
>>
>> Australia
>>
>>
>>
>> *From:* Healeys [mailto:healeys-bounces at autox.team.net]
>> *On Behalf Of *Bob Spidell
>> *Sent:* Monday, 25 May 2015 12:14 AM
>> *To:*healeys at autox.team.net
>> *Subject:* Re: [Healeys] Gearbox oil volume
>>
>>
>>
>> Offhand, I'd
>> believe the workshop manual first.  If you're
>> doing a drain-and-fill, you don't know for sure
>> how much residual oil is left so you have to go
>> by the dipstick anyway.
>>
>>
>> Bob
>>
>> On
>> 5/24/2015 6:32 AM, Simon Lachlan wrote:
>>
>> Hi,
>>
>> 1)
>> My car’s Driver’s
>> Handbook page 7, (AKD 3915A) tells me that:
>>
>> my MkII
>> BT7’s gearbox takes 5.75 imp pts (6.90 US pts)
>>
>> its
>> overdrive takes 1.33 imp pts (1.75 US pts)
>>
>>
>>
>> 2)
>> My BMC Workshop Manual
>> (AKD 1179D) tells me that:
>>
>> gearbox
>> 4.0 imp pts (4.80 US pts)
>>
>> Total
>> gearbox, overdrive fitted, 5.25 imp pts (6.30
>> US pts)
>>
>>
>>
>> 3)
>> My Haynes manual goes
>> for:
>>
>> Standard
>> box:- 5 imp pts
>>
>> With
>> overdrive:- 6.25 pts
>>
>>
>>
>> 4)
>> My Autopress manual
>> (Kenneth Ball) goes for:
>>
>> Standard
>> box:- 5 imp pts
>>
>> With
>> overdrive:- 6.25 pts
>>
>>
>>
>> ie only
>> Haynes and Autopress agree.
>>
>> I’ve had
>> this Healey for +/- 20 years and I’ve never
>> noticed these discrepancies! I seem to have
>> survived by using the dip stick, but I’d bet
>> that I’ve overfilled more than once.
>>
>>
>>
>> Any ideas?
>> I don’t recall this coming up before.....
>>
>>
>>
>> Thanks,
>>
>> Simon
>>
>> (And I
>> didn’t mention Redline once!)
>>
>>
>>
>>
>>
>>
>>
>>
>>
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