model year, the Grand Wagoneer received a new four-part front grille and a stand-up hood ornament. An updated audio system became a standard feature and a power sunroof installed by American Sunroof Corporation became a factory option. However, the most significant change was the installation of a fully revamped interior including a new dash pad, new instrumentation, new door panel design, shorter nap cut-pile carpeting, new leather, and corduroy seat cover designs as well as front seats that now featured adjustable headrests. Changes were made to the instrument panel that now featured square gauges, and contained an improved climate control system. The metal glove box door was also replaced with a plastic door featuring a woodgrain overlay. A new two-spoke steering wheel also included new stalks for the lights and wiper and washer controls on the column. The Selec-Trac driveline gained a new Trac-Lok limited-slip differential to send power to the wheel with the best traction. There were 17,254 Grand Wagoneers built in 1986. The last model year developed under AMC, 1987, was also the 25th anniversary of the Wagoneer design. Standard equipment included the V8 engine and self-sealing Michelin "Tru Seal" P235/75R 15 radial tires. The sound system included a new AM/FM electronically tuned stereo with a Dolby cassette player and four Jensen speakers. The exterior featured revised woodgrained sides in "marine teak" with new nameplates and V8 badges. On the inside were new tan or cordovan trims that replaced the honey and garnet colors, while the interior assist pulls on the door panels were removed. A combined 14,265 units were built by AMC and Chrysler for 1987. Standard equipment for late Grand Wagoneers included: 15″ Michelin all-season whitewall radial tires 15″ alloy wheels AM/FM stereo with cassette player Four AccuSound by Jensen premium speakers Air conditioning and heater with manual controls Dual front power bucket seats Leather-wrapped two-spoke steering wheel Leather and velour seating surfaces Digital quartz dashboard clock Full-size glove box Roof rack with roof rails Chrome front grille with a hood ornament Front fog driving lamps Power windows and power door locks Adjustable tilt steering column Dual-note high-low-pitch horn Power rear hatch window Rear window defroster Tinted windows Faux wood body side vinyl wood appliques Cargo cover Overhead console with compass and thermometer (1989-1991) keyless entry (1989-1991) Rear window wiper/washer (1989-1991) Optional equipment included: Towing package power Sunroof/moonroof Chrysler years 1987–1991 Chrysler bought out American Motors