I finally got to the dealer near me to update the TCM on 5/14. (TSB-21-015-25; Thanks Jinx1009 for posting!) They were able to duplicate the issue and performed the flash. As of today and 200 miles on the update, it seems to be shifting more smoothly without the clunks as noted before, though I'm still feeling a "nudge" on the 2-3-4 and 4-3-2 transitions. One interesting thing to note it was pouring rain when I picked up the truck from the dealer and quite cold out at 42 degrees. The next day was considerably warmer and the shifts were still consistent in their "feel" weather cold or hot. Fingers crossed this is a good sign. Going to put more miles on it this weekend and will see if this is the fix I was hoping for; stay tuned. Oh, and I have not gotten the truck up on ramps yet to find the remaining ground points. The one's I have pics of in an earlier post are all I have found to date.