Your TV cable probably just needs adjusted. Drivers side at throttle linkage. Hold throttle at wide open position, then press in the "reset". Push it back toward the bracket and release the reset. This can cause long, drawn out shifts as well as short shifts. A good transmission shop would help if asked, my transmission guy is particular on how he sets them. Here is a quick video overview. Common issue.
https://m.youtube.com/watch?v=CQlCkb_eIpA
Good luck, should be easy.