My son's 94 850 has a bad pulsing when applying the brakes at higher speeds over 50 mph. I too, apart the passenger side wheel to check the rotor and it seemed fine. The brakes were nicely lubed up since the caliper was replaced last year. the driver side is where I think I have the problem. The shop that did the state inspection drove the lug nut on so hard that I couldn't get the lug nuts off 3 holes. I used an 18 inch pipe the give me extr leverage on the lug wrench and the nuts were on so tight the Volvo wrench bent. So I am going to get a bigger bar the crack the lug nuts loose. But my question is if the rotor is warped from the lug nuts do I need to replace the rotor on both sides? Should I also replace pads each time I do rotors?

I am so angry because the rotors had plenty of life but now have to pay for new parts and do this work. Any help on the rotor/ pad replacement is greatly appreciated. Thanks
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1996 855 TL Platinum Ed., 1995 854 GLT 5 sp, 1995 854 (RIP), 2005 V70R (badly missed)