The transmission filter can help to remove Dust and contaminants from the automated transmission fluid, which serves many reasons, which include: There are 2 principal kinds of transmissions: automatic and manual. Automated transmissions use fluid couplings in place of a clutch, and they typically have extra gears than manual transmissions. https://filter-gearbox19517.theideasblog.com/34588003/how-much-you-need-to-expect-you-ll-pay-for-a-good-filter-gearbox