How do you drain and replace the differential fluid and do you put the GL-5 synthetic fluid?

Thanks!

Thank you for responding! It is now 10:00 a.m. EST and I still have not heard anything about my car! Now I'm beginning that they're deliberately taking things apart so they can come back with a laundry list of repairs for me. Ugh!

In any case, how much do you think it will cost me if they replace ...

Hello,

I just purchased my first Volvo XC70 from an auction two days ago. Understanding where I bought it, I anticipated some repairs might be needed. There's a knocking noise I hear that appear to be coming from the right-front side. I don't hear it when I'm on the highway, but I hear it driving ...