By Jim Meachen and Ted Biederman
While large body-on-frame sport utility vehicles are a dying breed, there's still a market for the full-sized SUVs for people who need maximum passenger and storage space, heavy-duty towing capability, and off-road proficiency. One of the remaining vehicles is the Ford Expedition, and for 2015 the big Ford has never been better with a new turbocharged V-6 engine, updated suspension, more interior flexibility, and subtle exterior styling changes.