With due respect, neither of those answers are correct. The Honda Accord does NOT have a replaceable transmission filter. Like most Hondas, a transmission service is just draining the old fluid and adding new fluid. The filter is designed so that it never needs changing. That means you'll pay about 1/3 of what most transmissions cost for a service. If the idea scares you, consider that there are alot of Accords out there with automatic transmissions that have over 250K on the original, automatic transmission (never been rebuilt).