WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Gross Pattern Error: Low Contact Pattern That Is Contacting More Toward the Heel
Courtesy of FORD MOTOR CO.
Fig 2: Gross Pattern Error: High, Thin Contact Pattern In the Center Of The Tooth