so i was rotating my tires and i noticed that my driver front caliper was dragging more than the passenger side. then i started to notice during heavy braking that the vehicle wanted to drift towards the left. so im wondering if pulling the caliper off and pushing in the pads with grease on the sliding part of the pistons would help freeing that up, or do i have to replace the whole thing? im not too worried about it now, but i wanted to reassure myself before i tow a trailer some 2,000 miles.