One problem related to tire bulge has been reported for the 1999 Ford Expedition. The most recently reported issues are listed below.
While traveling 75mph heard a loud noise. Tire had a blowout. Maintained control of vehicle until able to stop. Noticed left rear tire had lost its tread. Spare had a bulge. Tire had 41,000 miles on a 1999, Ford, Expedition, p255/70r16w2cu. The consumer purchased four new tires and one used tire to replace the firestone ones.