Windstar since its 1994 introduction. In its development, the Freestar saw the addition of heavier-duty drive axles, larger wheel bearings, and the standardization of four-wheel disc brakes. The 3.0L and 3.8L V6 engines were both retired, in favor of two new engines. In the United States (only), the Freestar was powered by a 193 hp 3.9L V6 (shared with the Ford Mustang) while an optional 201 hp 4.2L V6 (the base engine of the Ford E-150) was standard for Canada and export vans. The 3.9L and 4.2L V6 engines were both enlarged versions of the long-running 3.8L V6. As part of the initiative to improve driveline reliability, the 4-speed automatic transmission saw upgrades for improved shifting and reliability. Despite that, transmission failures were still common. NHTSA launched an investigation into the 2004-2005 Freestar and Monterey due to numerous complaints with regard to the equipped 4F50N transmission. Although the investigation is centered on the torque converter, specifically the failure of the torque converter spline shaft, these failures often required the entire transaxle be rebuilt or replaced. Ford later recalled 2004-2005 Freestars and Montereys to have the torque converter replaced free of charge, although 2006-2007 models still suffered from torque converter problems, despite not being recalled. In the redesign, the Ford Freestar saw a minor exterior facelift. While retaining much of the roofline of the previous-generation Windstar, in a shift away from New Edge design language, the Freestar adopted styling elements from several Ford vehicles, including the Ford Explorer, Ford Freestyle, and Ford Five Hundred. Shifting from the trademark curved dashboard of the previous Ford Windstar, the Ford Freestar adopted a flat dashboard, sharing many design elements with the then-upcoming Ford Five Hundred. In line with a number of competitive minivans, the Ford Freestar introduced a third-row seat that folded flat into the floor. Trim levels The Freestar carried much of the trim lineup from the Windstar, with two exceptions. The "LX" and "Sport" trim levels were dropped in favor of the "SES" and "S" trims. S (2004-2005) Included: cloth upholstery, 3.9L V6 engine, 16" steel rims with hubcaps, keyless entry, an AM/FM stereo, power locks, power windows with automatic driver's side window, adjustable pedals, power points, and manual sliding doors. SE (2004–2007) Included: 3.9L V6 engine, three-row seating, rear air conditioning (on 2006-2007 models), an AM/FM radio with single-CD player and digital clock and four speakers, power mirrors, locks and windows,