My 2006 GT died on the freeway in traffic today and posted low battery on my stereo, I was lucky it cranked back up. When I drive with the cruise control on sometimes it seems sluggish but not all the time. At first I thought I got bad gas but after reading I' am sure it is the faulty diode on the alternator. Will Ford replace the Alt if my warranty is expired since it is a faulty alternator? My warranty expired 3,000 miles ago. I have 63,000 miles on her, the alternator should not be getting sick at those mile.