Hi, I want to redo my brakes on my 1989 780..I had the poltergeist 780 one that was having all kinds of problems...turned out to be a broken wire on the harness at the connector that is embedded in the plastic connetor that clips onto the sensor under manifold #3. It only took three mechanics and about $200 bux to find it. Next time I will go right to the volvo specialist. So now I want to attack the brakes...it seems to pull when braking at high speeds. So will relubricate the glide pins. I don't want to mess with the abs sensors so my question is this. Do I need to relubricate the wheel bearing when I change my rotors or can I leave it alone? Is there any recommended interval from volvo to do this procedure and can I damage the abs sensor if I mess with the hubs on these cars I am used to regular hubs without abs. Second question, Has anyone tried the powerbrake rotors they make..the ones with the two eliptical traces cut into the rotor? How do they perform compared with regular rotors?..thanks..Leo