Help please, I have squeaking rear brakes when driving off, I have read on here that it might be the handbrake but when I touch the brake pedal it stops. So assuming it is the calipers stuck or sliders dry. I recently did the front right and after cleaning the sliders (not dry) found this made no difference so replaced the caliper. Almost buying both rears from autodoc but worry problem might only be sliders. Is this likely? As always your help much appreciated. 
