I have a 2002 sport trac with the 5r55e transmission last week the overdrive light started to flash. I took it in and had a trany service done to it and that did not solve it. I read another thread that talked about the valve body gasket so I checked mine by driving it in first and seeing if the engine slowed it down and it did. Also it is throwing a code about the torque converter slipping. Please if anyone has any advice let me know.