Does anyone know the spec for the gear oil in the rear differential? I have a reference to "Volvo Rear Axle Oil 11 61 620" but I am wondering if this is just a quality automotive gear oil...I want to avoid the drive to the dealership for this if the gear oil I have will do. Thanks in advance and please excuse if this is double posted...

4/13/2005 Addendum...

Seeing that no one could provide the answer to this...I went by Volvo today and spoke to service manager...paraphrasing what he had to say: "I'm not sure if it is the same as standard auto gear oil...so I'll just give you this bottle (with about a pint in it) of Volvo Rear Axle Oil!!! I could hardly believe it! Anyway, real nice guy and we talked about 2000 V70XC for a few minutes. I talked to him about maintenance/servicing the bevel gear and he said "we do it as part of the 60K service". So I asked him what exactly do they do and he said they drill out a bolt in the case, drain the housing, replace with clean Volvo Transmission Oil 11 61 648, and then install new drain plug. Not wanting to drill out the bolt in the bevel gear housing, I bought a $10 suction pump at Harbor Freight (known in my house as The Dark Side) and ordered the oil - $23 per liter! I'll just draw all the old gear out and pump in clean oil.