Going to do the transmission fluid change. Decided to do the Diff and bevel gear while I'm at it. <p>1. With diff and bevel gear, should I stick to the Volvo gear oils or are you guys/gals using and alternative? Maybe something that you can find locally?<p>2. For the rear diff change, did most you guys use a jack to lift the rear end or did you drive backwards onto a ramp.. And do I have to worry about front bumper clearance?<p>3. Is the bevel gear and the angle gear the same thing? If not move to question 4.<p>4. I have 50k on the car, should I change the angle gear fluid too? If so is there a DIY (prefer with pics) out there?