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Transmission fluid is added right into the dipstick hole. Remvoe the dipstick and use a small funnel.
Honda Service News Notice: If you're replacing transmission fluid in a CVT-equipped vehicle, or just topping it off, make sure you're using the new CVT fluid (P/NNNN-NN-NNNN. From here on, DON'T put ATF-Z1 in a CVT. If you're topping off a CVT that's already got ATF-Z1, there's no need for concern; this fluid is compatible with ATF-Z1. All CVT-equipped Hondas starting with the 2006 models and onward will be factory-filled with the new CVT fluid.