vehicle, the Navigator was mechanically related to the Ford Expedition; both vehicles were related to the 1997 Ford F-Series. The Navigator featured independent front suspension (short-long arm/SLA); the rear suspension was of a live rear axle design. Using an optional feature from its Ford counterpart, the Navigator was designed with load-leveling air suspension; tuned primarily for ride comfort, the air suspension lowered itself when the vehicle was parked. Although technically available with rear-wheel drive, the primary drivetrain on the Lincoln Navigator was ControlTrac, a computer-controlled automatic four-wheel drive system. As with the Expedition, the Navigator was fitted with four-wheel anti-lock disc brakes. Using the same 230 hp 5.4L Triton V8 as the Expedition/F-150 paired with the 4-speed 4R100 automatic transmission, the 1998 Lincoln Navigator came with a towing capacity of . During 1999, Lincoln would fit two different engines in the Navigator in an effort to better match full-size SUVs from General Motors. At the beginning of the model year, the Triton V8 was upgraded to 260 hp; as a running change during the model year, Lincoln would replace the SOHC Triton with a 300 hp DOHC 5.4L V8, named InTech (borrowing a name from the Mark VIII). Due to the increase in power, towing capacity would increase to over . Body Although the Lincoln Navigator shares the same bodyshell as the Ford Expedition, giving it a similar exterior appearance, Lincoln stylists would make many design changes to differentiate the two vehicles. Forward of the windshield, the Lincoln Navigator shares no body panels with its Ford counterpart, with its own front fascia (a grille design shared with the 1998 Lincoln Town Car and the 2000 Lincoln LS), wheels, roof rack, lower body trim, and taillights. The interior of the two vehicles shared more commonality, with the dashboard common to both vehicles (with greater use of wood trim); the Navigator was given its own seat design. To make for a quieter interior over the Expedition and Ford F-Series, the Navigator made greater use of sound deadening materials and higher-quality carpeting. The Lincoln Navigator included standard features available or optional on the Expedition, including power driver and passenger bucket seats, 2nd-row bucket seats (with a 2nd-row bench seat as a delete option), floor consoles, and keyless entry. The few options available included a power moonroof, a universal garage door opener, 7 seven to 8 eight passenger seating an electrochromic rearview mirror (filtering