Missing shifts under load

[powerboatr]

This weekend and again this morning
we were towing the fiver.
a few times in traffic going about 40 and winding out in 2nd/3rd she would do what felt like skip a shift, she would start to shift then change her mind and grab the next up gear.
didnt miss a beat speeding up, just felt weird
and coming down the mountian, tow haul had the rpm in 2dn gear trying to slow us down, we held at 57 and she was SCREAMING near 4k rpm. tranny temps dropped to "to Cold to read" on the gauge.
and it works 100% better in traffic than it did before the reflash. got a little whiplash when it dropped into 1st just before i stopped.
other than that the boss had a good pulling weekend

 

[powerboatr]

Hit a brick wall at 60 mph

update
ol girl is irritating me
after we climbed the mountain on the way home yesterday afternoon.
she did great up the mountain, 2nd gear 3700 rpm 125 0egts boost 30 psi and 45 mph 3/4 throttle

however
after the crest and onto relativley flat rode she would not go any faster than 60, and as she approached 60 she made weird STRESS noises,
almost as iff the tranny was slipping, but the tach held steady and the speedo stayed steady, i had the throttle almost floored and she was not speeding up, no smoke egts at 1000-1200, boost 30 psi

thinking a dealer visit is in order