I have a 2003 motorhome on a f-350 chasis. On my last trip the overdrive went out. All other gears seem to be working fine. The overdrive swith on gear shift is flashing off and on. It has 23k miles on it. Any suggestions?

 

Can you have the code read at one of the parts vendors like Auto Zone ect.. They'll do it for free.. Could be a circuit/solenoid problem but best to have the code as part of the diagnosis...