overdrive light flashing on column

[tazz6918]

I'm not sure if you can help me but i have 2 2000 f-250's diesel and gas and i can't seem to get any help with the gas one. There is a code flashing for a sensor in the transmission and the truck has no power but before i replace it i am wondering if there is a possibility of a chaffed wire or some other problem because sometimes when it rains the light doesn't flash and the truck works great, lots of power

[redboost10]

check the vss on the rear end. we had a customer come in with the same problem, the speed sensor in the rear end was either loose or had a pinched wire, i really cannot remember but i do remember it was the speed sensor in the rear end and it was an easy fix...not saying yours is an easy fix if the truck is down on power though