i'm sorry i didn't get into it more in the pm. it was 7:00 and i was trying to get out of the shop. now that i'm home i will try to explain it.
if the solenoids are not clogged, this is what's going on. honda transmissions have major design flaws, the pump is incredibly small and they don't have enough volume to feed the whole transmission.
the pressure regulator system cuts off converter charge at low rpm's, when you are on the highway at 65-70 in 4th or 5th in full l/u the rpm's drop down low enough to cut converter charge when it needs it most.
the valve body is sealed with aluminum end plugs, they wear out from the constant hammering of the valve against them. when they wear out, they leak.
combine the end plug leak with the pressure regulator cutting off converter flow, and you have fluid boiling in the converter.
all of this is dependent on your solenoids condition, if they are clogged you may catch it in time before all of the major damage is done.
honda does not know how to fix this because if they did they would have done 15 years ago.
when i rebuild them, they get new aluminum end plugs with orings, they also get a new pressure regulator valve designed with a check valve inside of it to allow constant converter charge and prevent this from happening again. i also bypass the radiator on every one and install a 24000 gvw cooler.
like i said in the pm, i could write a book on this. the first thing you need to do is get it checked for codes, advance auto won't scan the transmission controller, you will need to find a shop or someone with quality scanner to do this for you. if you have pressure switch codes i will explain what to do then. if you don't have pressure switch codes, pull the solenoids off and check the condition of the screens.
if it is neither of those, you have most likely not caught it in time. if it were a solenoid problem(electrically) the pcm would have detected it and set the cel.
i deal with this everyday, hell if it wasn't for honda and chevy i wouldn't be in business.