Excessive rear rattle, especially on worn road surfaces.
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The rattling stop when very light pressure is applied to break pedal. Trouble started after a Ford oil change, which included car inspection (fluid levels,brakes,tires,tire rotation). Rattle was minor at first, but has really gotten louder. When it first started Ford dealer took a quick look on my next oil change and said they could find nothing. If I made an appointment, they could check it further. I didn't have time.
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Brake caliper is loose or it has missing brake pads/caliper 'mounting' hardware! .. Lightly applying brake tightens everything back up & stops noise - until let off brake pedal.