1. The manual transmission housing is not equipped with a dipstick. The transmission oil level in the gearbox is checked by unscrewing the check/fill plug from the side wall of the manual transmission housing. Jack up the car and place it on supports. Find the plug and carefully wipe it and the surrounding surface of the housing with a clean rag. Unscrew the plug - the transmission oil level in the housing should reach the lower edge of the check/fill hole, otherwise it is necessary to make the appropriate adjustment. If the car is raised to provide access to the manual transmission housing, before climbing under it, make sure that the supports are securely fastened.
Note: The vehicle must be installed strictly horizontally.
2. If necessary, add the required amount of oil of the required grade to the gearbox housing through the same hole - use a funnel. The level can be considered normalized when the oil starts to flow out of the hole in a thin stream.
3. Screw the plug back in place and tighten it securely. Perform a short road test of the car, after which make sure that there are no oil leaks through the plug.
[Original published on this resource: HONDABOOK]