Yesterday, at the end of a relatively long freeway drive, as I came of the freeway, my car started dropping out of overdrive.
I arrived at my destination, and the car was able to cool.
When I returned to it for the return trip, everything went well, until after driving awhile at highway speed, it started dropping out of overdrive again. Thinking that I knew what the problem was, and what it was going to take to fix it, I continued carefully to make my way home.
However. I turned off the overdrive, thinking I would just go home in 3rd gear, rather than have it jumping in and out of gear. That worked, for awhile.
Then It started dropping to second gear, and just generally misbehaving Hmmm. Now Im in unfamilar territory, not having a clue to whats happening.

This morning, I started the car and took it for a short drive to find that the transmission is shifting flawlessly. I just went for a short drive and didnt allow it to really heat up.
Whats going on her.
Oh, the fluid level is good, but the fluid is rather dark.

I drain and replaced the fluid less than 2 years ago(about 16 months). However, during the flush I think I erred in following the flush procedure and possibly allowed it to turn for a short period without the proper amount of fluid. Now wondering if that did harm.
Any advise or observations will be greatly appreciated.

Larue