Ok, here's the deal, earlier today, I was driving on a pretty rough secondary road when the tranny temp light flashed off and on twice for about 2 seconds each time, and also, my O/D off light flashed on twice as well. This all happened during about a 5 minute period, and the two lights were on at different times, not at the same time. I wasn't driving fast enough to know if the overdrive was actually turning off. When I got back on a smoother road, all was good, and it hasn't happened since then. I haven't had a chance to get under the truck and look at the connections, but I'm thinking this is electrical. One other thing, I wasn't pulling anything behind the truck when the trans temp light came on, also I know that the cooling fan is working properly, so air was being pulled through the radiator which in turn would keep the ATF where it should be as far as the temp. I was going no more than 35 on a flat road with no strain on the tranny. So what do you guys think, does this sound electrical?

 

It sounds like maybe your connections are loose on the tranny. When ya get a chance, crawl under it and check all the connector's, not just the ones that you may suspect. Also, check to make sure your fuses are in nice and tight in the fuse panel.