SVL 2020633 Ring and Pinion Gear Set for Ford 7.5" Axle Axle: Ford 7.5 inch - 3.73 ratio Industry # F7.5-373 1997-1999 Aerostar, 1983-1992 Bronco, Cougar 1980-1997, 1991-1997 Explorer, 2001-On Sport Trac, 1980-On Mustang 4/6 Cylinder, 1983-On Ranger (without 4.0L), 1980-1997 Thunderbird