Well, I decided to give it a little wait so I can have the codes read when the warning signals show again. But it's been almost three weeks since the last episode of the symptoms I described, with nothing. Vehicle drives fine (I do love the way these SUVs drive and handle when they're working right).
I was told a 'P1748' code would signal a need to change the 2/4 brake solenoid on the transmission valve body. Apparently, that job is all that's needed in these cases, but the dealerships like to replace the whole valve body unit (obviously at much expense to the customer).
So, I've been driving the vehicle every day since, waiting for the codes to reappear. I've probably put 1000 miles on it with no incident, whatsoever. Hopefully, if the symptoms do come back, this is all it is and I won't have to spend $2200 replacing the entire unit, as the dealer wishes.
Anyway I hope this information can help somebody, even if I can't get any advice here. And I'll be sure to post my findings if there are any further developments.
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