Important Safety Issue: Sudden Downshifts Increase Crash RiskFord is recalling more than 550,000 F-150 pickup trucks in the United States due to a potentially dangerous transmission problem. The recall covers certain 2014 model year F-150 trucks that can unexpectedly downshift to first gear no matter how fast the truck is going. According to documents filed with the National Highway Traffic Safety Administration (NHTSA), this issue is caused by a lost signal between a transmission speed sensor and the powertrain control computer. This malfunction can also be caused by corrosion or problems wit…