Ford will recall nearly three-quarters of a million vehicles in the US. A transmission defect may let cars roll away without any action from the driver. The NHTSA says this is a serious hazard. 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 linked with this fault at this time. 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 at no cost. Owners should watch their mail to see if their car is affected.