Synthetic Gearbox oil

[Sasha Nackovski <snackov@domain.elided>]

Hi,

Any digest members have good or bad experiences using Castrol Synthetic
(75w/90) Gearbox oil in their transaxled Alfa's? I realise Redline
synthetic is the oil of choice for transaxled cars, but it is not
readily available here in Australia, and is to expensive to have sent
from the US. I have tried Valvoline synthetic in the past and was not
entirely happy with the level of improvement. Any idea's/opinions? The
gearbox in question has been rebuilt around 30,000km's ago, has no
synchro wear (probably due to my driving technique more than anything
else), but I have been running it on normal 80w/90 mineral oil and I
think it is time I upgraded for the sake of gearbox longetivity.

Thanks,

Sasha Nackovski- Whittlesea, Victoria, Australia.

------------------------------