Transmission Oddity on 2000 Ford Explorer

My Explorer only seems to do this when it's raining or when driving on wet snow. At random times, could be every 1 minute or could be every 15 minutes. My transmission acts like it's down shifting for a split second, then goes right back. So I would have to assume that moisture is getting into something underneath my Explorer and freaking out the TCM or possibly a solenoid in the transmission. Anybody else ever heard of this before? If so, what's the common fix for it? If nothing else, where can I find some kind of a diagram that shows me where all my speed sensors are, where the TCM is located, and any solenoid electrical connections on the transmission?

Asked by for the 2000 Ford Explorer
Any codes present ?
1 more answer
ive had this happen on two vehicles, both turned out to be a poor elect connection. a little delectric grease in the pigtail for the pcm workd both times.