Did the brakes on my 06 AT this weekend. Replaced pads, rotors and rebuilt calipers so they slide nicely. used star wheel to retract e-brake all the way.
On both rear wheels, when installing the new rotors, there is drag. I'm not sure why or shat to do about it...

Hub only and they spin nicely. Put the rotors on and seat them 90% of the way and they spin ok. but then push them on the rest of the way and screw in the rotor screws and there is significant drag. I think it may be against the back plate so I tried to hammer it outwards slightly but didnt help much.

Anyone have an idea of what the rear rotor is rubbing on and how to deal with it? I found some other forums talking about rubbing on the back plate and they cut off the bottom part of it. Another said that will only be a temporary fix and the real fix is to remove the hub and clean the rust off that is pushing the plate outwards.

 

Jack up the car and spin the wheel to see where the rotor is rubbing, or remove the wheel
to get a better view. Have had cars that didn't rub the rotor when stationary, but when
in motion there's just enough play to have the rotor rub the backing plate, but mostly
on the front during turns. Some were so rusted that it was better to remove the backing
plate rather than trying to bend/correct.