Reviews of OEM Honda automatic transmission

I *hated* the 2025 Honda Civic Sport (150 HP). I couldn't wait to get rid of it. In my opinion, the automatic transmission makes weird decisions on shifting at low speeds. Normal mode often seemed to be in the wrong gear. Sport mode never shifts to your top gear.

The five speed automatic in those things are absolute trash.

Had an 02 accord that was told all the auto transmissions fail early. It only started slightly slipping on the 1-2 shift (only at heavy throttle) at 290k and then by 330k it was consistently slipping on the 1-2 and 2-3 but was perfectly drivable until it was totaled.

The transmission itself is not going to fair well with a significant power increase as its a very fragile automatic, even by Hondas terms. I would imagine your automatic would moan and groan even at that point, and your transmission would probably buckle after a short period of time afterwards.