end Limited trim level replaced the Eddie Bauer Premier model (though the regular Eddie Bauer was still available) and featured chrome accented roof rails, chrome-clad aluminium wheels, PowerFold power assisted stowable side view mirrors and chrome tipped exhaust. An upper high end King Ranch trim level with Castano leather seating was also introduced. The base 4.6 liter Triton V8 engine was dropped for the 2005 model year as the 5.4-liter Triton V8 was made standard on all Expeditions and updated with 24-valve technology and variable valve timing. Along with the 2005 model V8 engine update, the Expedition also received a significantly updated version of the four-speed 4R70W automatic transmission. The new four-speed automatic transmission, now called 4R75E, featured fully electronic Smart Shift technology. A turbine speed sensor improved transmission control and provided the basis for the fully electronic shift scheduling. The transmission's microprocessor speeds were improved for better responsiveness and precision of the control system. The transmission was continuously learning, and would calculate the torque in the next gear and schedule shift points based on the Expedition's projected performance in the next gear. For 2005 model Expeditions the 4R75E transmission is designated by the letter "B" on the manufacturers safety compliance certification label, located in the driver's-side doorjamb. For 2006 model Expeditions, the 4R75E transmission is designated by the letter "Q". 2006 No major cosmetic or mechanical changes. Last year model for the U222. The Gentex auto dimming rear view mirrors were updated. Two new exterior colors were added later on within the model year. They were Pewter metallic and Dark Copper metallic. Medium Flint grey interior was also added to Limited models later on within the model year. Chrome tipped exhaust was made standard on King Ranch models. 2006 would be the last year model for the NBX trim. The ultrasonic rear park assist and SafetyCanopy side curtain airbags were offered as standalone options. Adjustable headrests were also added to the front seats to replace the one piece units. Russian Москва-Чукотка (Moscow-Chukotka) overland expedition On April 12, 2006, three second-generation full-size Ford Expedition Eddie Bauer vehicles completed a 32-day overland expedition. This was a trip across North Asia and the Arctic Tundra. Six team members consisted of leaders, Alexey Mikhailov and Alexander Borodin, technical director, Andrey Rodionov, and professional off-road drivers,: Sergey Goryachev, Victor Parshikov, and Alexey Simakin. The route took them on permafrost and crossed the Arctic Circle