On 960s and V90s make sure to replace the rear pads even if you have a little pad left (2-4mm).I put off changing these for a long time since the wear rate is low and kept getting an odd grumble (not a pulsation)in the brakes only when stopping from high speeds (above 45 mph).It always felt like it was the fronts,but returned shortly after installing new pads/rotors on front!Just recently,rear pads were down to the metal-replaced them and that grumble is gone!Something (glazing?) apparently happens to these.Im posting this separately for 960/V90 owners who have complained about just this symptom of late.
sredwine 98 V90 has 94K;94 940T has 158K