Goofy Shifting or ???

1998 Sonoma 4.3 auto, Just changed the trans filter, now when driving at a steady speed does not matter how fast just at a steady speed the truck seems like it is shifting in and out of overdrive, Im not saying thats what it is doing for sure but it feels like it is speraticly jumping i increase on the foot feed and it is fine, but soon as i level off it does it again, and its not all the time it can come and go it started yesterday. Note i did replace the TPS last night thinking that may be the issue. Any ideas?

You could have knocked of a solenoid connector when the pan was off, a scan with a trans function scanner can check all those functions.

would that send out a code?