Vehicle was harsh shifting in one, two, then long shifting in three. Would frequently surge when attempting a stop on the last 1-3 mph. I Had the dealer do a flush and reset. After the reset, transmission was 95% good. After reset no harsh shifting on one or two.

Now after a few weeks, now long shifting in three and harsh shifting into 4. This is in Normal shift mode.
In manual sport mode upshifting and downshifting are smooth at low acceleration and fast acceleration
In automatic "sport" mode- the tranny shifts smooth all gears.

Dealer can't figure it out, anyone out there have any ideas or similar experience? This is on a stock tranny. Thanks in advance for the help.