In some instances an inline filter could benefit and extend the life of your transmission. In line filters come as kits, with the clamps and hose, as shown in the picture or just the filter. If ordering just the filter you need to supply your own clamps and hoses or reuse the one already in place.
This should not take the place of regularly scheduled maintenance as recommended by the manufacture of your vehicle. Having said that, adding an inline filter could be beneficial. Consult your transmission professional for more information regarding any upgrades to your transmission.
When changing the filter and and oil in your unit you should always consider a quality fluid, new filter, pan gasket and inline filter.