i put mine in neutral and let the X rest on the brake, then put it in park.

per mfg recommendation, do not turn the rotors. check you control arm bushings. you can also try bedding the pads, but can be dangerous if you have something more critical wrong than some brake warping / buildup.

the parking brake doesnt apply the brakes, but a seperate pad on the output drive of the tranny. you can adjust it but if it gets burnt out i think its a very difficult job to replace. (so be sure not to drive with it engaged.)

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