Hmmm....I went by the mechanic on the way home. He told me that he drove my truck several times today and it was fine. He said he ran the hell out of it to try to get it to duplicate what I had told him and nothing happened out of the ordinary.

He also said he scanned for codes and there were none stored.

Are either of your scenerios an intermittant problem?

You think maybe the check ball in the trans cooler line might have gotten stuck?

The OD Off light came on first and the truck downshifted itself. A couple minutes later the Trans Temp light came on. That's when I shut it down and called a wrecker.

At any rate, I told him to use the truck all day tomorrow for chasing parts or whatever to see if it acts up.

I am SO DONE with this truck. Look for it on ebay soon.