Auto Gearbox

Hi there,
I live in France but am Scottish ! There are very few SVXs here in France and the main dealers are not able to help -in fact all have never even seen one.
I need some help in repairing the gearbox of my 94 car - it only works in first and second and having taken the gearbox out and cleaned the filter I found some small metal particles and black material.The oil is dark brown and doesn't smell so good.....

I would be grateful for any advice and help you can give me.
Is there a workshop manual for this gearbox - is it the same gearbox in any other Subaru car???
I think I need some help......

Very many thanks

Ron Wallace