10R80 transmission have many issues regarding their shifting and the use of the adaptive tables. Have experienced multiple hard shifts, flare shifts and the occasional downshift in the heads up display. It will be in a higher gear like 7 or 6 and show it dowshifted to 1 for two seconds. Then it gs back to normal. Previous owner already had the transmission repaired and it still has the same issues. I get a code a few minutes later after it shifts horrible for a few minutes. Pointing to issues with the incorrect gear ratios. These transmissions are hazardous as it will happen randomly and will go back to normal most of the time. Have been caught at a light before where it won’t shift down back to 1st. I have to put it in park or reverse for a few seconds for the transmission to find itself. Very dangerous to be doing that in traffic. Have had multiple near misses. Of course Ford just says the transmission needs to be changed out for a new one. At 9K-10K for the repair each time and frequently its absurd. The issues have to be fixed or else you are stuck buying a new transmission every 50-100K. I have 90’s Ford’s with the original transmission still working.