A transmission filter helps keeps your transmission running at peak performance. Situated above the transmission pan, this type of filter, like an hydraulic filter or coolant filter, collects excess fluid plus dirt, debris, and other contaminants. And like oil filters, transmission filters needs to replaced after a certain amount of time, as part of typical vehicle maintenance. Not only do we carry transmission filters, but we also carry hydraulic filters and fuel filters. Zoro also has many filter accessories and filter service kits.