rpms are very high at low speeds

Hello, sounds like you have an issue with the transmission shifting at the appropriate times. This can be influenced by many things -- not just some kind of internal transmission issue. A diagnostic tool that can analyze real time component data should be used to not only check for any kind of existing diagnostic trouble codes (DTCs), but monitor the shift commands and responses of the automatic transmission. My guess is that there will be some kind of diagnostic information to go off of. Good luck! Here are some shops near you that you can try for help: https://repairpal.com/repair-shops/honda-repair-and-service-in-wylie-texas