I haven't run into that specific situation again. At the time I thought it was confusion in the computer. I had cruise on and it was in 5. It was kicking into 4 right when I took the A/C off which kicked it into 5 and then due to the hill it kicked into 4 again. All this happened pretty much at the same time I pushed the button. I think the computer thought it was in 5 when it wasn't.
I have no idea if the fluid had anything to do with it but I had it flushed to be safe. It seems kind of quick for trans fluid to break down to me. Since I still have a warranty I get all of my work done at the dealer. It was a little over $200 to have it flushed at the dealer.

 

So aubrey, just to clarify. You have had the loss of 5th happen in conjunction with the manual mode override, correct? When I lose 5th, I always lose the ability to select a gear manually, hence the issue.

 

that makes sense, but how long did your car take to "reset" itself. It seems the only way that my car will reset is to turn the car completely off.

 

Correct.
It was 114 degrees out. I was in auto with the a/c and cruise control on at the bottom of the hill doing about 65. As I came up the hill it, all at about the same time, shifted to 4 and I turned off the a/c and it switched to 5 then back to 4. It stayed in 4. I went to manumatic and couldn't get it to do anything but it was clearly in 4 from the rpms. I stopped at a rest stop to take a leak. Got in and was fine from there on.