Hi

                       I have a very strange brake problem on my 850 that neither I nor the mechanic that works on my car
                       can figure out. I had new front OEM size cross-drilled rotors installed along with some KVR brake
                       pads about a month ago. I broke them in, as instructed, and as far as I can tell, they work wonderfully
                       and very smoothly. But recently, I've taken a new route to work that has a steep descent that requires a
                       good amount of braking and that is when I first felt some vibration. It only occurs on this stretch of road
                       and I have yet to duplicate this vibration on any other surface and/or road around where I live. I don't
                       feel the vibration particularly in the steering wheel or anything, just some noise and then the whole car
                       seems to quiver/vibrate--can't even accurately point out that it is even the front brakes causing it. And it
                       only occurs at very very low speed, by my accounts, the noise & vibration kicks in at the last 2 to 3
                       seconds of braking and by that time, I've slowed to practically a crawl. Today I had my mechanic
                       re-torque the lug nuts (to make sure they are torqued within spec) and visually inspect the brakes and he
                       could not find anything at fault. I hope the rotors aren't warped and my mechanic assures me that
                       warped rotors would be more obvious and would happen at all speeds. Can anyone offer me some help
                       on this one?

                       If your front rotors were warped, normally the steering wheel would quiver from side to side when
                       braking. The vibration of the car (vibra-bed) is normally caused by the rear rotors. If your rear rotors
                       and pads are close to new also, you might try the cut out shim kit that Volvo sells to help with the rear
                       brake vibration. Your discription of the vibration and how to cause it doesn't sound too bad. When
                       really bad a short trip up the freeway with 5 to 6 pedal applications will normally get the car shaking
                       good on demand, and it will continue until the rotors cool down. Try the cut out shims and let us know
                       how it went.

                       --
                       Rich K.

                       Hey Rich K. thanks a lot for your input--much appreciated. So it's possibly the rear rotors causing the
                       vibration? But those haven't been touched, I only had the front pads and rotors replaced last month. I'm
                       actually still on the original rear rotors although the pads have been changed before but that was quite a
                       while ago (at least 6 months or even a year ago). But thanks for pointing that out, I will do some more
                       investigating and take a good look at those rear brakes now.