ppc
M Go Blue
Are you referring to the disc brake rubbing or the parking brake shoes? The rear rotor is secured by the lug nuts and If you don't have those tight that could cause drag. Until you have all the bolts torqued and lugs tighten your just guessing.
That said disc brakes rely upon the rotation of the rotor and a slight amount of runout to separate the pads from the rotor. If the slide pins are sticking one pad can release and the other drag. That is why I suggested lubricating those. Bottom line disc brakes will always drag a small amount but not enough so they can't be turned. I would suggest road testing and then recheck.
That said disc brakes rely upon the rotation of the rotor and a slight amount of runout to separate the pads from the rotor. If the slide pins are sticking one pad can release and the other drag. That is why I suggested lubricating those. Bottom line disc brakes will always drag a small amount but not enough so they can't be turned. I would suggest road testing and then recheck.