Ford will recall nearly three-quarters of a million vehicles in the US. A transmission problem may let cars roll away without driver input. The NHTSA says this is a serious hazard. Drivers could lose control even when they do nothing. Ford will send letters to owners how to fix the issue. No crashes have been linked with this fault at this time. The recall does not cover all Ford models. Only certain vehicles with this transmission flaw are included. Ford has not given a timeline for fixes. Dealers will check and fix the problem at no cost. Owners should watch their mail to see if their vehicle is included.