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 major risk. Drivers could have no control even when they do nothing. Ford will send letters to owners how to fix the issue. No accidents have been tied to this fault so far. The recall does not cover every Ford vehicle. Only certain vehicles with this transmission flaw are included. Ford has not given a repair time. Dealers will check and fix the problem for free. Owners should wait for a letter to see if their car is affected.