[Mgs] 90w in Transmission?

[melfrankus at carolina.rr.com]

FWIW my Haynes (1978 light blue cover edition) recites Castrol 20w-50 for the gearbox, 4.5 pints.  
Another part of the manual tells me whether this is British or US pints. 
The manual recommends changing this out every 12000 miles because metal filings will be present in the trans. oil.
Mine was last changed in 1983 or 1984.  Still shits strong, syncros don't seem worn.  But the next time I change engine oil this fall, will change this out too.  
I did replace the diff goo with 90w Hypoy gear oil when I put new drive shaft assy in last year.
My MG runs fine, just figured out that when my MG is 70 years old, I'll be 100.  I really have too much idle time.
Mel, 71MGB/GT 

---- Paul Hunt <paul.hunt1 at blueyonder.co.uk> wrote: 
> I'd be very surprised if a Haynes for the 4-cylinder (and that's the only one
> I'm aware of) does say 90wt oil for the gearbox, it would be an error.  Mine
> says engine oil as does the (green cover) Leyland Workshop Manual.
> 
> PaulH.
>   ----- Original Message -----
>       I have a Haynes that says 90w but my green-cover Bentley recommends
>   the motor oils.
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