By Bernie Woodall DETROIT (Reuters) - In a fresh sign of pressure on U.S. automakers, Ford Motor Co on Monday said it will shut down production of its best-selling F-150 pickup truck for a week at a Kansas City assembly plant, and temporarily idle three other plants over the next several weeks. About 13,000 Ford hourly workers will be laid off during the temporary shutdowns. The cuts will hit Ford's three highest-volume models in the United States.
