Dear Doctor: I have 115,000 miles on my 2002 Ford Explorer V-6. The other day while I was driving the “O/D Off” light on my dashboard started to flash. It starts flashing after five minutes of driving. I read online that the 2002 models generally have bad transmissions and the flashing light means the transmission is about to fail. I’d like your opinion on this. Mark
Dear Mark: The flashing overdrive light means there’s a problem with the transmission not shifting into overdrive, or there is some slipping. The technician will need to check for trouble fault codes. In some cases there could be internal transmission problems. There have been some transmission failures on these vehicles. But no, the flashing light does not mean your transmission needs an overhaul.