Ford will recall nearly three-quarters of a million vehicles in the US. A transmission problem may let vehicles move without any action from the driver. The National Highway Traffic Safety Administration says this is a serious hazard. Drivers could have no control even when they do nothing. Ford will mail owners how to resolve the problem. No accidents have been linked with this fault at this time. The recall does not cover every Ford vehicle. Only certain vehicles with the defect are included. Ford has not given a timeline for fixes. Dealers will check and fix the problem at no cost. Owners should wait for a letter to see if their car is affected.