I've had this truck for a little more than a year.
Early on when pulling one grade near my residence
I experienced an intermittent "missing" especially when accelerating.
Of course, my mechanic was unable to duplicate the symptom.

Recently the problem has become more pronounced
and can be initiated almost every time I activate the Power "drive".

I say "missing" because it is a kind of "cough" or "jerking".
Originally, I suspected a fuel problem, but the Power activation seems to point to transmission.

BTW, it also seems to be more pronounced during the heat of the day.

Oh, the vehicle has 200k + miles and though the seller claimed AT was replaced
when I had it flushed the tech said "Absolutely no way has this AT been replaced."

Searching through the forum I see some other issues. We do get pretty how here

So, I'm fishing for comparable experience, confirmation of problem,
and any other recommendations regarding AT rebuild, etc.

Thank you
Cliff