on 2/20/01 1:39 AM, scott beavis at sbeavis@solartronanalytical.com wrote:
>> The 78 doesn't have an access hole to the tranny filler. You have to go
>> under the car and fill it through a plug in the right side of the tranny
>
> I'll get the jacks and axle stands out this weekend and have a nose
> underneath. Wish I had a pit!
>
>> case, using either an oil pump or a long rubber hose leading up through the
>> engine compartment. Lawrie recommends 30wt racing oil for the OD tranny.
>> When you're changing the oil make sure you open both drain plugs -- the OD
>> unit has its own drain, although you use the same filler for both.
>
> One filler does both sumps yeh? So I must use the same oil in both the box
> and the OD? ie: 30wt I was going to use normal 20w50 in the OD, but did
> plan to use gear oil in the gearbox. The A series seems ok with 20w50 in the
> gearbox so I assume the B series must be ok too.
>
Why does everyone insist on using multigrade oil in the tranny? It simply
has no advantage there, and neither do the added detergents, etc.
>> The diff has a drain plug straight in the bottom and a filler plug (as you
>> noted). It takes regular 85/90wt gear oil.
>
> Ok, that one looks quite easy. Do I fill it to the brim or half way or what?
Until it dribbles back out at you. That is assuming everything is dead
level, not jacked up, etc.
>
>> This still seems to be too much water loss. Your idea of an expansion
> bottle
>> (below) would help quantify it. But the gray oil really makes it look like
> a
>> water leak in the block or head. It may not be the gasket -- did you have
>> the head checked for cracks?
>
> No I didn't get it professionally checked. I just looked at it and it looked
> ok. I have a spare head so I'll clean that up and get it refaced and fit
> that. It could be that the old head is warped and isn't clamping the gasket
> firmly. It did overcook a couple of times when we had water loss problems
> before.
>
That seems like a good idea to me.
>
> Cheers,
> Scott
>
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the red one with the silver bootlid.
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