Well, um, I'm on tranny #2 and valve body #2 on tranny #2
Just hit 41k last week. Original tranny was replaced @ 19k-ish due to a whine/whirring noise when in reverse (for the record, did not push or ask for trans to be replaced, had them "note" the noise and 3 days later I get a call telling me I was getting a new tranny). It operated flawlessly and I hoestly had some reservations about my new truck having the trans swapped since it operated just fine..............so after the new trans was swapped in, had to have the valve body replaced since it would not shift out of 7th gear if traveling in excess of 73 mph.
Having gone thru this experiance, I still absolutely love the 8 speed and don't regret for a second trading in my 2010 after only 10 months of ownership to get it! Sometimes stuff happens, whatever, love the way this thing drives, especially with the 3.92's!