Nevertheless, inside filters are costlier than externals and it is much more challenging to exchange internal filters, as you’ll have to remove the transmission pan first to succeed in The inner filter (it will also be important to exchange the pan gasket). Some vehicles have automatic transmissions with 2 filters https://filtergearbox09864.blogoscience.com/40369298/how-filter-gearbox-can-save-you-time-stress-and-money