Problem With The All Wheel Drive

I bought my xc90 in 2006. I always had problem driving it on snow specially going on a steep hill. since the snow doesn't last for long in Seattle, I didn't worry about it. Now I had a problem getting out of a friends parking lot on a steep hill with out snow. I took it to the dealer and 106992 verified that the all wheel drive is not working. Either the sleeve kit between the all wheel drive unit and the propellar shaft needs to be replaced at cost of 850 dollars or it could be the angle drive is worn out as well and it could cost 3000 dollars. I went some other place for second opinion and they told me that the problem is Volvo doesn't lubricate it very well when they sell the car. They said that they have seen this problem over and over again. I had 2 used volvos before I bought this one and I was very happy with them . I love my xc90 till this problem, pls. help. Thanks, Wasi.