well, i may have figured it out. my low/reverse band was super loose. like 5 1/5 turns out. i may have a worn drum. I tightened it up- torqued it to 70 in-lbs, then backed it off 2 turns. i barely have much thread left on the adjuster as the lock nut is flush with the last thread.

i can see the drum has some wear. hopefully, the band (new last year) isnt toast.

i'll know more min a few hours when i get some more type F fluid and give it a ride