Even so, interior filters are costlier than externals and it is way tougher to switch inner filters, when you’ll have to remove the transmission pan 1st to succeed in The interior filter (it may also be necessary to exchange the pan gasket). Some vehicles have computerized transmissions with 2 filters https://filtergearbox56813.bloggazza.com/33110056/indicators-on-filter-gearbox-you-should-know