In the actions done to the automatic trans, was it just a "seals and frictions" replacement OR were some other things done to hopefully "make it better
If the "normal driving" shiftpoints moved up or down, that's a linkage adjustment, usually. IF the WOT shiftpoints changed, that usually is in the governor itself.
As noted, "more info needed" as to car, model year, engine, modifications of engine, etc. Correctly checking the HOT transmission fluid level is always important, aiming more toward above the "ADD" line than at the "FULL" line.
Please advise,
CBODY67