Hello, its automatic transmission fluid (ATF) for the gears. Surprising but true for a manual gearbox. When I drain the whole lot out, I just get a 5 litre / gallon can and most of it gets used. Can't remember about the diff apart from it needing the usual EP80 or EP90. I seem to remember that a couple 1 litre bottles did the trick. Hope this helps, bogbasic.
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA. 1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue). 1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess). 1989 340 1.7 GL, 108k, 3 door (Red Ness). More info here!
40W magnatec for the gears is the latest recommendation, as opposed to ATF. Sounds mad but that comes from Volvo and Castrol. There's a thread about it buried somewhere.
I think all this confusion about 10w40 or ATF for the gearbox puts a lot of people off changing it, for fear of choosing the wrong one.
I don't know how different the two are, and I doubt the wrong one would make too much difference. Although some brand new oil of the wrong type may be better than 20 year old oil of the wrong type, but still...
I spent a bit of time searching on here about what to use and there's lots of opinions on the matter. But I had some Magnatec in the garage so thought I may as well give it a go
Carl
Rover SD1 Vitesse (and no Volvos )
But previously:
1988 Volvo 360GLT
1988 Volvo 360GLT
1984 Volvo 340DL www.carlgibbs.com/gallery