Totally a hypothetical question ;)

By the way the unnamed individual explained the delayed shifting, I might bet that the kick down was stuck at least somewhat back, because if it was all the way forward (disconnected), it would cause almost immediate 1/2 shift and an early 2/3 shift.
Like it wouldn't shift into Drive till about 48 mph and then downshifted to First at about 28 mph.
Hopefully you will be OK

Cley