I have a grinding feel under light braking and it exists even after I'm off the brake pedal.

08 MCS with OZ wheels and non run flat tires.

This seems to have started when I had Mach V springs installed but I've now gone back to the stock springs and it still exists.

It didn't do it when the car was new (it now has about 2500 miles).

I've taken off the front wheels and don't see any marks from anything rubbing.

It sounds and feels like real hard compound brake pads - like kevlar pads I used once on an different car. The MCS has the stock pads.

Any ideas? Under hard braking I don't feel or hear it - only under light braking. I'm almost to the point of calling the dealer....

 

Did you torque the wheels EVENLY to spec.? you might have a bent/warped rotor.

 

yes, very careful about that (torquing) but I think you might be right about the rotor.

Just curious about why the incorrect torquing would warp a rotor though....