First question-how many miles? Next-original trans? Next-Fluid level been check PROPERLY? MUST check with it parked onLEVEL ground , engine OFF , preferably warmed up first , then shut off for about 30 seconds then check dipstick (I repeat- with engine OFF). last When was the last time the fluid was changed and was HONDA fluid used , or aftermarket?
There is a Honda tech on this site, if you'll wait, not sure when he'll be on, but usually in the late evenings, He can answer that question better then any of us guessing. Be patient it is the weekend.
CORRECTION-----I work on Hondas' , at a Honda dealership , I can and often do fix them , but PLEASE don't call me a 'tech' anymore............I'm old school......the kids are the techs..............lol?