I had a similar problem with my 96 V-6. When there was a rough shift the OD light flashed on and off indicating a problem with the shift. The dealer said the selonoid body needed replacing which i did and it was fine for 2 years. Recently happened again, every day for three or four days. Checked with Ford and was told that the sensors sometime act up when it is damp out. Might want to get the sensor checked before any major tranny work.
