O/D light question
96 Cougar 4.6 V8, 77,000 miles on it. I was recently driving on the freeway i noticed a weird thing maybe it has something to do with the speed sensor but when i put the cruise control on the speed went up about 5-10 mph. The next morning i started my car and the O/D light was flashing, it shifts perfectly fine it goes into O/D fine, but on my way home from work it didn't flash and i was able to turn O/D on and off. Well Today i went to work and on my way the O/D light flashed again for a minute or two then went off, on my way home it stayed off and like i said everything feels fine, sounds fine. It did rain alot recently and the car has the 4R70W tranny in it, i was reading that the speed sensor can get wet easily and could cause a short circuit. I checked the fluid it smells and looks brand new, i bought the car with 74,000 miles on it and it had a tranny flush right before i bought it. I want to take it into the shop and have them pull the code but like i said the light flashes when it wants to.