I recently purchased a 2004 v6 convertible Mustang just for fun. The brakes have a squishy wet fart feeling just before you come to a stop. This happens when you're at 2 to 3 mile an hour it feels like the brake fluid is relieving but I do not know where. Does this sound like a bad master cylinder or one of the modules in the ABS system? Any ideas? The ABS light is not on. The brakes feel firm and stop just fine.