1999 FORD F-250 SUPER DUTY XL SUPERCAB 4x4. Year: 1999 Ford F-250 Super Duty XL SuperCab. XL SuperCab with an 8-foot bed, dark green exterior and tan cloth interior. First-year Ford Super Duty equipped with the desirable 7.3L Power Stroke turbo diesel, 4R100 automatic transmission, four-wheel drive and manual locking front hubs.