Ford will recall nearly three-quarters of a million vehicles in the United States. A transmission defect may let cars roll away without any action from the driver. The National Highway Traffic Safety Administration says this is a major risk. Drivers could lose control even when they are not touching the pedals. Ford will mail owners how to resolve the problem. No crashes have been tied to this fault so far. The recall does not cover all Ford models. Only specific models with the defect are included. Ford has not given a timeline for fixes. Dealers will inspect and repair the problem for free. Owners should watch their mail to see if their vehicle is included.